ZIB

1

Electronic Resource

Use of an (n, α) nuclear reaction to study the long-distance transport of boron in trifolium repens after foliar application (1980)

Martini, F. ; Thellier, M.

Springer

Planta 150 (1980), S. 197-205

add to mindlist on the mindlist

Details

ISSN: 1432-2048

Keywords: Boron ; Foliar nutrition ; Nuclear reactions ; Transport (boron) ; Trifolium

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract The growth of white clover (Trifolium repens L.) is severely inhibited by boron starvation, but a foliar treatment with boric acid can transitorily alleviate the deficiency symptoms. The 10B(n ,α)7 Li nuclear reaction has been used to study boron transport in the plant after foliar application. More than 98% of the boron supplied remained at the point where it was applied to the leaves, and less than 2% was useful to the growth of the treated plant. This small “efficient” portion of boron was quite mobile. It was distributed to the different parts of the plant, then was transferred from the oldest parts to the newly formed leaves. Physiological and agronomical implications of these data are discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00390826

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

2

Electronic Resource

Nucleophile Substitutionen an Kohlensäurederivaten. XII. Kinetik und Mechanismus der Reaktion von N-Nitro-N-alkylurethanen mit primären aliphatischen Aminen (1980)

Bacaloglu, R. ; Prodan-Deac, Y. ; Csunderlik, C. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 10-20

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Nucleophilic Substitutions to Carbonic Acid Derivates. XII. Kinetics and Mechanism of the Reaction of N-Nitro-N-alkyl-urethanes with Primary Aliphatic AminesThe aminolysis of N-alkyl-N-nitrourethanes takes place, as the kinetical studies demonstrate, by means of several consecutive steps.The nucleophilic attack of the amine (first step; reaction B), as well as the proton-transfere (second step; reaction C), are quick pre-equilibres, followed by the slow, rate-determining elimination of the nitramino-group (reaction D).During the deprotonation, an intermediate with two to the nitramino-group antiperiplanar orbitals is formed, providing the necessary mesomeric assistance of the elimination.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220103

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

3

Electronic Resource

Zur Analytik von Kohlenwasserstoffen mit Hilfe der Massenspektrometrie. V. Abhängigkeit der elektronenstoßinduzierten Fragmentierung monocyclischer Kohlenwasserstoffe von der Ringgröße (1980)

Herzschuh, R. ; Epsch, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 21-27

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Analysis of Hydrocarbons by Means of the Mass Spectrometry. V. Fragmentation of Monocyclic Hydrocarbons as a Function of the Ring SizeThe E.I.-spectra of the cycloalkanes CnH2n (n = 5 - 14) and of the cycloalkenes CnH2n-2 (n = 5 - 12) exhibit strongly influence of the ring strain energies on the stability of molecular ions. Medium-sized cycloalkanes and cycloalkenes (n = 9 - 11) show exceptional behaviour under the conditions of the electron impact ionization, which is discussed on the base of ring strain effects.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220104

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

4

Electronic Resource

Zur Analytik von Kohlenwasserstoffen mit Hilfe der Massenspektrometrie. VI. Der Einfluß von Ringgröße und Konfiguration auf die Fragmentierung der Bicyclo(n.1.0)alkane und ihrer Halogenderivate beim Elektronenstoß (1980)

Herzschuh, R. ; Epsch, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 28-36

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Analysis of Hydrocarbons by Means of the Mass Spectrometry. VI. The Influence of the Ring Size and the Konfiguration on the Fragmentation of Bicyclo(n.1.0)alkanes and their Halogen Derivatives by Electron ImpactThe mass spectra of cis and trans bicyclo(n.1.0)alkanes and their halogen derivatives are discussed. The ring strain energies of these compounds influence the stability of their molecular and fragment ions.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220105

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

5

Electronic Resource

Untersuchungen zum UV/VIS-Spektralverhalten von Azofarbstoffen. III1. Mitt. siehe [5] II. Mitt.; Z. phys. Chem. (im Druck).Empirische, an Azobenzenen gewonnene Absorptionsinkremente und ihre Beziehungen zu Reaktivitätskonstanten, spektroskopischen Substituentenkonstanten und Ionisierungspotentialen (1980)

Mustroph, H. ; Epperlein, J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 49-54

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Studies on UV/VIS Absorption Spectra of Azo Dyes. III. Empirical Absorption Increments Derived from Azobenzenes and their Relationship to Reactivity Constants, Spectroscopic Substituent Constants and Ionisation PotentialsAbsorption increments ∊ which specifically characterize the substituents are derived from the difference in exitation energy between azobenzene and monosubstituted azobenzenes. These increments have been found to predict accurately the effect of substituents of the long wave π → π* band of polysubstituted azobenzenes.Comparison of the ∊ values with HAMMETT-σ reactivity constants reveals direct proportionality between the two sets of constants. There is also a direct proportionality between the increments and spectroscopic substituent constants introduced by BLOOR and COPLEY. Furthermore, a correlation of the ∊ values with the ionization potentials of substituents was found.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220108

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

6

Electronic Resource

Aluminiumalkyle mit Heteroatomen. X. Elektronenstoßinduzierte Fragmentierung von Trimethylsilylalkanonen (1980)

Sonnek, G. ; Baumgarten, K.-G. ; Habisch, D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 94-98

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Aluminium Alkyls with Heteroatoms. X. Electron Impact Fragmentation of TrimethylsilylalkanonesIt has been shown that the fragmentation of trimethylsilyl alkanones on electron impact proceeds with a uniform mechanism which differs from that of silicon-free ketones by the fact, that no α cleavage is observed.It consists of a McLafferty rearrangement at the silicon-free alkyl group, followed by a McLafferty-type cleavage involving migration of the silyl group to yield the radical ion of the respective trimethylsilyl enolether.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220113

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

7

Electronic Resource

Cyclisierungsreaktionen β, γ-ungesättigter Kohlensäurederivate. IITeilweise aus der Dissertation R. Widera, Fakultät für Mathematik und Naturwissenschaften der Karl-Marx-Universität Leipzig 1978.. Reaktionen β, γ-ungesättigter Carbamidsäurederivate mit elektrophilen Reagenzien - Synthese von N-substituierten Oxazolidin-2-onen (1980)

Mühlstädt, M. ; Widera, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 139-146

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Cyclization Reactions of β,γ-Unsaturated Derivatives of Carbonic Acid. II. Reactions of β,γ-Unsaturated Carbamic Acid Esters with Electrophilic Reagents - Synthesis of N-Substituted Oxazolidine-2-onesN,N-Disubstituted β,γ-unsaturated urethans have been cyclized to N-substituted oxazolidine-2-ones by dry hydrogen chloride in methylene chloride. The N-substituted urethan 1a reacts with hydrogen chloride to form the urethan 2a and the 2-oxazoline 3 Reaction of 1 with bromine yields the corresponding N-substituted 5-bromomethyl oxazolidine-2-ones 6

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220117

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

8

Electronic Resource

Masthead (1980)

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980)

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220201

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

9

Electronic Resource

Die Darzens-Reaktion mit Thiazolaldehyden (1980)

Chiorean, V. ; Mager, S. ; Fârcâşan, V. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 207-212

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The Darzens Reaction with ThiazolaldehydesThe reaction of formyl-phenyl-thiazoles 3-9 with ω-chloracetophenone 1 and p-nitrobenzyl chloride 2 was studied. It is shown that the Darzens reaction occurs easily with the 4-formyl derivates. There is some competition by the Cannizzaro reaction. The structure of isomers 16Z and 16E was established by 1H-n.m.r. spectroscopy.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220205

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

10

Electronic Resource

Konduktometrische und spektroskopische Untersuchungen der Wechselwirkung von Lewis-Säuren mit HalogenkomplexenVII. Mitteilung der Reihe „Zur Rolle von EDA-Komplexen bei kationischen Polymerisationen“ (VI. Mitt. vgl. [1]) (1980)

Heublein, Günther ; Grimmer, Cornelia ; Spange, Stefan

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 223-228

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Conductometric and Spectroscopic Investigations of the Interaction of Lewis Acids with Halide ComplexesThe interaction of counter ions with Lewis acids has been investigated using mode systems of the type (C6H5)3C⊕ MXn+1⊖ (M = Sb, As, B, Fe; X = Cl, F) by means of conductometrical and UV-spectroscopic methods. The changes of conductivity were strongly dependent on the nature and concentration of the Lewis acid. The results point to 1:1-complexes between Lewis acids and counter ions. The behaviour was found to be complicated by dissoziation resp. assoziation processes. Ligand exchange reactions between Lewis acid and counter ion have also been found.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220207

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

11

Electronic Resource

Zur Reaktion der N-Sulfinylamine mit Isocyaniden und die Synthese von 2,5-Diaryl-3,4-diarylimino-1,2,5-thiadiazolidin-S-oxiden (1980)

Beckert, R. ; Mayer, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 273-280

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The Reaction of N-Sulfinylamines with Isocyanides and Synthesis of 2,5-Diaryl-3,4-diarylimino-1,2,5-thiadiazolidin-S-oxidesN-Sulfinylamines 1 react with isocyanides 2 to give isocyanates 3, isothiocyanates 6, and especially 2,5-diaryl-3,4-diarylimino-1,2,5-thiadiazolidin-S-oxides 7.This new heterocyclic ring system 7 can also be synthesized in high yields by a cyclization reaction of tetraarylated oxalic amidines 9 with thionyl chloride.The acid catalyzed hydrolysis of the heterocyclic compounds 7 leads to oxalic anilides 8, the hydrolysis with alkali forms amidines 9. The amidine 9a reacts with N-sulfinyl-p-toluenesulfonamide 11 to give an open chained adduct 12.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220213

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

12

Electronic Resource

Azoperoxide. VI. Selektive Spaltungen von β-Azo-acylperoxiden (1980)

Schulz, Manfred ; West, Gerd ; Ourk, Sakum ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 295-304

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Azoperoxides. VI. Selective Decomposition of β-AzoacylperoxidesThe selective decomposition of the O—O-Groups in the azoperoxides 1 and 2 is possible by reaction with dimethylaniline at 35°C. Rate constants were measured and the decomposition products were analyzed. Intermediates are azoalkyl radicals. The radical yield of the amine induced decomposition of 2 in ethylbenzene is 8.2% at 35°C.UV irradiation of the azoperoxides 1 and 2 at 20°C in ethylbenzene results in a quantitative and selective decomposition of the azo groups. Intermediates are C-radicals with intact peroxide groups. The reaction of 1 and 2 with triethylstannane yields reduction products of the O—O-groups and the N=N-groups, respectively.

Additional Material: 5 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220216

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

13

Electronic Resource

Untersuchungen zur Struktur von Kupferkomplexen der 2,4-Dichlorphenoxyessigsäure (1980)

Jähnig, W. ; Stösser, R. ; Ewert, U. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 321-326

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Investigations about the Structure of Copper Complexes from 2,4-Dichlorphenoxyacetic Acid

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220219

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

14

Electronic Resource

Formation of 4,4-Dialkyl-2-oxo-morpholinium Chlorides. IINew pesticides and intermediates; part I, this Journal, 321 804 (1979) (1980)

Witek, Stanisław ; Os̰wieşcimska, Małgorzata

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 367-374

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Zur Bildung von 4,4-Dialkyl-2-oxo-morpholinium-chloridenDialkylaminoethanole 2 reagieren mit Chloracetaten 1 zu den N,N-Dialkyl-2-oxo-morpholinium-salzen 6. Es wird gezeigt, daß die Reaktion zweistufig und über die Ester 3-5 verläuft, welche zu den Salzen 6 cyclisieren. Das Zwischenprodukt 5a wurde isoliert, seine Struktur aufgeklärt und ein Reaktionsmechanismus vorgeschlagen.2-Oxo-morpholiniumsalze 6 hydrolysieren in wäßriger Lösung zu den entsprechenden Betainen 7. Der Hydrolysegrad wurde bestimmt. Die Betaine 7 können in umgekehrter Weise zu den 2-Oxomorpholinium-Derivaten 6 cyclisieren.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220304

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

15

Electronic Resource

Interaction of Trivalent Iron with Some Cannabinoids and their related compounds (1980)

Mobarak, Z. ; Aly, H. ; Bieniek, D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 362-366

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Wechselwirkung zwischen Eisen(III)-Ionen und einigen Cannabinoiden und verwandten VerbindungenDie Reaktion zwischen Orcinol, Olivetol oder Cannabidiol und dreiwertigem Eisen wurde spektroskopisch untersucht. Zwischen Eisen(III)-Ionen und Orcinol bzw. Olivetol bilden sich in Methanol 1:3 Komplexe (Dissoziationskonstanten 1,5 × 10-5 bzw. 2,5 × 10-7). Keine Wechselwirkung konnte unter analogen Bedingungen zwischen Fe3+-ionen und Cannabidiol beobachtet werden.

Additional Material: 6 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220303

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

16

Electronic Resource

Sauer katalysierter Disulfidaustausch von S-Alkylthio-cystein-Derivaten (1980)

Kunzek, Herbert ; Haupt, Renate ; Huschert, Günter

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 381-393

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Proton-Catalyzed Disulfide Exchange of S-Alkylthio Cysteine DerivativesAlthough N-unprotected S-alkylthio cysteine derivatives are relatively stable in acid solutions, N-acylsubstituted and N-urethane protected S-alkylthio cysteines react easily by disulfide exchange. As a rule the frequently used tert.-butyloxycarbonyl amino protecting group, present in ethylthio cysteine derivatives can′t be removed selectively without disulfide cleavage, whilst the 2-(p-biphenylyl)isopropyloxycarbonyl and the 2-phenyl-isopropyloxycarbonyl amino protecting groups are removable without any structure change of the alkylthio thiol protecting groups. It is advisable to realize this acid demasking of the amino groups by means of weak deblocking reagents. Comperative experiments in acid solution prove S-tert.-butylthio group to be the most stable protecting function, whilst isopropylthio cysteine derivatives are more stable than the corresponding S-ethylthio compounds. All these results and experiments with addition of different thiols as well as u.v.-spectroscopic investigations indicate, that the observed acid catalyzed disulfide exchange proceeds via a carbonyl neighbouring group effect and formation of thiazolidinium and thiazolinium intermediates, respectively.

Additional Material: 6 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220306

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

17

Electronic Resource

Zur Polymerisation des Ethylens mit Vanadium(III)amid (1980)

Radwan, F. ; Ulbricht, J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 465-469

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Polymerization of Ethylene with Vanadium(III)amideBy addition of AlEt3, AlEt2Cl or AlEtCl2 to V(NPh2)3 · THF · 0,5 Dx. the polymerization of ethylene under normal conditions is started with increasing rate. The influence of the concentration of the catalyst components, the monomer concentration and the ageing time of the catalytic system on the rate is studied.

Additional Material: 6 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220318

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

18

Electronic Resource

Effect of substituents on the Ionization Constants of Some 8-Quinolinol Azo-Compounds (1980)

Khater, M. M. ; Issa, Y. M. ; Shoukry, A. F.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 470-474

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Substituenteneffekt auf die Ionisationskonstanten von einigen 8-Hydroxychinolin-verbindungen

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220319

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

19

Electronic Resource

Synthese of 2,3-Diformyl-4-methylbenzofuran and its Derivatives (1980)

Prewysz-Kwinto, A.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 487-490

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Synthese von 2,3-Diformyl-4-methylbenzofuran und entsprechenden Derivaten

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220323

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

20

Electronic Resource

Photochemie substituierter Cycloheptatriene. VII. Zum Photogleichgewicht der sigmatropen Wasserstoffwanderung in Diarylcycloheptatrienen (1980)

Paulick, W. ; Abraham, W. ; Kreysig, D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 499-502

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Photochemistry of Substituted Cycloheptatrienes. VII. On the Photoequilibrium of the Sigmatropic Hydrogen Shift in Diarene Cycloheptatrienes

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220326

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

21

Electronic Resource

Zur alkalischen Verseifung einiger Dimercaptole der Acetessigsäure- und Benzoylessigsäureester (1980)

Larsson, Erik

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 522-526

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Alkaline Hydrolysis of Some Dimercaptoles of Acetoacetic Acid and Benzoylacetic Acid Esters

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220330

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

22

Electronic Resource

Onken, D.: Antibiotika, chemie und anwendung. 141 S. mit 55 Abb. und 3 Tab., Format 17,6 × 10,5 cm, Berlin: Akademie-Verlag 1979. (Wissenschaftliche Taschenbücher, Bd. 205) Brosch. 8,- M (1980)

Johne, S.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 527-528

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220332

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

23

Electronic Resource

Eine einfache Synthese von Analoga des 8-Aza-D-homo-estrans (1980)

Moiseenkov, A. M. ; Rozhkov, E. N. ; Strakov, A. Ya.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 554-558

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: A Simple Synthesis of 8-Aza-D-homo-estrane Analogs8-Aza-D-homo-estrane analogs containing the angular methyl group at C-13 have been prepared by one step synthesis starting from 4-acetyl-4-methylcyclohex-2-enone and 3,4-dihydroisoquinolines.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220405

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

24

Electronic Resource

Zur Berechnung der kritischen Mizellbildungskonzentration isomerer und substituierter Alkansulfonate (1980)

Sowada, Rudolf

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 590-598

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Concerning the Calculation of Values of the Critical Concentration of Mizellization for Isomeric and Substituted Alkane SulphonatesBased on Lin's approach hydrophobicity indices I have been calculated for the isomeric dodecane sulphonates and some substituted alkane sulphonates from published cK data. These I values are useful for estimating cK values of new surface active alkane sulphonates.

Additional Material: 9 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220409

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

25

Electronic Resource

Azomethinimine. I. Zur Photoreversibilität des Systems Azomethinimin/Diaziridin, untersucht an Pyrazolidon-Azomethiniminen (1980)

Tomaschewski, G. ; Geissler, G. ; Schauer, G.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 623-628

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: Azomethine-Imines. I. To the Photoreversibility of the System Azomethine-Imine/Diaziridine,Investigated on Pyrazolidone-Azomethine-IminesPyrazolidone-azomethine-Imines of the type 1 with polycyclic aromatic substituents R undergo a photoreversible reaction to diaziridines 2. In the u.v./VIS-spectra of the two forms 1 and 2 the difference of the λmax-values is about 100 nm. Therefore this system is suitable as a new reversible photochromic system. The influence of substituents R′ to the u.v./VIS-spectra of the 1.3-dipolar form 1 is discussed.

Notes: Die seit langem bekannten Pyrazolidon-Azomethinimine 1 sind als carbonylstabilisierte 1,3-Dipole aufzufassen und lassen sich relativ leicht synthetisieren [1, 2]. Später wurde erkannt, daß diese Verbindungen beim Belichten aus der 1,3-Dipolform 1 in die bicyclische Diaziridinform 2 übergehen und daß diese Reaktion thermisch reversibel ist [3]. Uns interessierte die Frage, ob die Diaziridine 2 auch photochemisch wieder in die Dipolform überführbar sind.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220413

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

26

Electronic Resource

The Use of o-Nitrophenylsulfenyl-N-Carboxyanhydrides in N-Hydroxypeptide Synthesis (1980)

Chimiak, A. ; PołOṅSki, T.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 669-673

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Verwendung von o-Nitrophenylsulphenyl-N-carboxyanhydriden zun N-Hydroxypeptid-synthese

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220420

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

27

Electronic Resource

Heterocycles with potential heterodienes. I. A New Synthesis of 3-Methyl-1-phenyl-4-phenylazomethine-5-pyrazolone: Comparison with other synthetic routes (1980)

Tacconi, G. ; Marinoni, G. ; Righetti, P. P. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 674-678

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Heterocyclen mit potentiellen Heterodienen. I. Eine neue Synthese des 3-Methyl-1-phenyl-4-phenylazomethin-5-pyrazolons

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220421

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

28

Electronic Resource

Proton N.M.R. Spectra and Stereochemistry of Diastereomeric Arylsubstituted β-Aminoketones (1980)

Spassov, S. L. ; Panajotova, B. ; Spassov, Al.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 701-703

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Protonen-NMR-Spektren und Stereochemie von diastereomeren arylsubstituierten β-Aminoketonen

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220425

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

29

Electronic Resource

Heterocycles with potential heterodienes. III. Synthesis and Cycloaddition of 4-Carbomethylen-3-methyl-1-phenyl-5-pyrazolones (1980)

Tacconi, G. ; Invernizzi, A. Gamba ; Righetti, P. P. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 711-715

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Heterocyclen mit potentiellen Heterodienen. III. Synthese und Cycloaddition von 4-Carbomethylen-3-methyl-1-phenyl-5-pyrazolen4-Carbomethylen-3-methyl-1-phenyl-5-pyrazolone (4a, 4b) entstehen aus 2-Pyrazoline-, 5-dion 2 und Benzoylmethylen- bzw. Carbomethomethylen-triphenylphoranen (3a bzw. 3b) durch Wittig-Synthese. 4a, 4b wurden durch IR-und NMR-Spektren gekennzeichnet. Sie reagieren „in situ“ mit Ethylvinylether zu den eis und trans 2,3-Dihydropyran [2,3-c] pyrazolen 5a, b bsw. 6a, b

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220503

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

30

Electronic Resource

31P-NMR-Untersuchungen N-Aryl-substituierter Iminotriphenylphosphorane: Hammettbeziehung zwischen 31P-Verschiebung und Substituentenkonstanten (1980)

Bödeker, J. ; Köckritz, P. ; Köppel, H. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 735-741

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: 31P-NMR Investigation of N-Aryl-substituted Iminotriphenylphosphoranes: Hammett Relationship between 31P Chemical Shift and Substituent ConstantsThe 31P chemical shifts of p- and m-substituted N-arylimino-triphenylphosphoranes reflect the electronic influence of the substituents and can be correlated by a Hammett relationship. This new correlation was used for the estimation of σ- resp. σ-values for p-(CH3)2N-, p-C6H5CO- and p-C6H5—N = N-groups as well as for β-naphthyl- and pyridyl(4)-rings. The applicability of a similar Hammett equation for the o-substituted compounds is not possible.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220507

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

31

Electronic Resource

Zur Chemie der 3-Aroylimino-3H-1,2-dithiole (1980)

Kibbel, H. U. ; Teller, J. ; Hansen, P. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 769-784

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Reactions of 3-Aroylimino-3H-1,2-dithiolesThe thiolates 3 and 10 prepared from 3-aroylimino-4-aroylthio-5-cyano-3H-1,2-dithioles 1 with bases, react with alkylhalides and acylhalides to the corresponding 4-S-substituted compounds 6, 11 and 7, respectively. Treatment of the thiolates with 1-chloropropanone gives the bicyclic compound 12 by intramolecular cyclization involving the 5-cyano-group. 3,6-Bis-(acylimino)-3H,6H-[4,3-c] [1,2]-dithioles 2 or 8 are prepared from the S-acylated dithioles 1 or 7 and sulphur in pyridine/benzene. 1,2,4-Triazines 13 are formed by the reaction of dithiol es 1 orthiolates 3 with phenylhydrazine. The thiolates give upon protonation the mesoionic dithioliumthiolates 4. Coordination compounds are obtained from the reaction of the thiolates with cations of 3d-elements. On the basis of the chemical behaviour of the new 3-acylimino-1,2-dithioles and the results of spectroscopic measurements a strong bonding interaction between the N-acyl-carbonylgroup and the dithiole ring system in these compounds is supposed.

Additional Material: 8 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220511

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

32

Electronic Resource

Reactions of β-Diketones and p-Tosylhydrazine (1980)

Ashraf, C. Muhammad ; Lugemwa, F. K. Nelson

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 816-820

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Zur Reaktion von β-Diketonen mit p-Tosylhydrazin

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220516

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

33

Electronic Resource

Zur Synthese neuer N-Aryl-N′-cyanformamidine (1980)

Fedgenhäuer, Gabriele ; Moll, Rainer

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 826-830

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The Synthesis of New N-Aryl-N′-cyanoformamidines

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220518

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

34

Electronic Resource

Vergleichende 1H- und 13C-NMR-Untersuchung von Benzylidenamino-N-Heterocyclen (1980)

Bödeker, J. ; Courault, K. ; Radeglia, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 846-848

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Comparative 1- and 13C-N.M.R.-Investigation of Benzylidenamino-N-Heterocycles

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220522

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

35

Electronic Resource

Ahrens, G.: Giftgesetz und Giftverkehr (Ein Kompendium für Leiter, Beauftragte und Prüfende) 386 S., 14,5 × 21 cm. Leipzig: Johann Ambrosius Barth 1979. Flexibler Kunststoff 12,- M. (1980)

Lohs, Kh.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 864-864

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220526

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

36

Electronic Resource

Chemistry and application of organic isocyanates. I. Application of tolylene-2,4-diisocyanate for the Syntheses of New Surface-Active Urethanes of Sucrose and Glucose (1980)

Lesiak, T. ; Iwaszkiewicz-Nowak, J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 877-883

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Chemie und Anwendung von organischen Isocyanaten. I. Verwendung von Toluylen-2,4-diisocyanat für die Darstellung von neuen grenzflächenaktiven Saccharose und GlucoseurethanenDie Synthese von 3-Isocyanato-4-methyl-phenylcarbaminsäure-n-hexyl-, n-heptyl-, n-octyl-, n-nonyl-, n-decyl-, n-dodecyl-, α-terpinyl-, bornyl- und linalyl-estern 1-9 wird beschrieben.Bei der Umsetzung von 1-9 mit Glucose bzw. Sucrose entstehen die neuen, grenzflächenaktiven Saccharose- und Glucoseurethane 10-21 (Isomerengemische). Oberflächenspannungen wäßriger Lösungen dieser Verbindungen in Abhängigkeit von der Konzentration werden mit jenen von Natriumdodecylsulfat verglichen.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220604

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

37

Electronic Resource

Propellanes. III. Use of 1,1,2,2-Tetrabromomethylcyclopropane for Preparation of (6.6.1)Propellanes - 3,6,10,13-tetrathia(4,5,11,12-dibenzo)-(6.6.1)propellane (1980)

Jamrozik, Janusz

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 909-914

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Propellane. III. Verwendung des 1,1,2,2-Tetrabrommethylcyclopropans zur Darstellung von (6.6.1)Propellanen - 3,6,10,13-Tetrathia(4,5,11,12-dibenzo)-(6.6.1)propellanDurch Reaktion des 1,1,2,2-Tetrabrommethylcyclopropans mit 1,2-Benzoldithiol wurde die tricyclische Verbindung 1 mit Propellan-Struktur erhalten. Die Struktur dieser Verbindung wurde mit Hilfe spektroskopischer Daten und massenspektroskopischer Fragmentierung ermittelt. Für das Propellan 1 werden zwei Konformationen (mit koplanarer und nichtkoplanarer Lage der Benzolringe) bei einer „twist-tub“ Konformation der achtgliedrigen Ringe vorgeschlagen.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220608

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

38

Electronic Resource

Polymerisation von Vinylverbindungen in Gegenwart von Titan(III)-chlorid (1980)

Moszner, N. ; Hartmann, M.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 963-970

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Polymerization of Vinyl Compounds in the Presence of Titanium(III)ChlorideThe polymerization of styrene, acrylonitrile and some methacrylates initiated by a titanium(III) chloride dichloroacetic acid redox system was studied. The monomer selectivity of the polymerization in the presence of titanium(III) chloride was found to be affected by a reductive termination reaction. Titanium(III) chloride acts as a retarder in the polymerization of styrene initiated by azobisisobutyronitrile (AIBN). The polymerization of polar monomers like acrylonitrile, methyl, ethyl and propyl methacrylate by AIBN is inhibited by titanium(III) chloride.

Additional Material: 7 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220613

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

39

Electronic Resource

Untersuchungen zur Sulfochlorierung von Paraffinen. VIII. Untersuchungen über die Verseifung von definierten Alkansulfochloriden mit Natronlauge (1980)

Hampel, M. ; Just, G. ; Krebes, W. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 987-990

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Studies on Sulphochlorination of Paraffins. VIII. Studies on the Hydrolysis of Individual Alkane Sulphochlorides by Sodium HydroxideThe hydrolysis of individual C1—C5 alkane sulphochlorides by sodium hydroxide in dioxane/water (1:1) was kinetically studied at 25°C by means of stopped-flow technique, measuring the change of electric conductivity.The rate constants were influenced by steric hindrance, but in all cases were higher than the rate constant for alkaline hydrolysis of benzene sulphochloride, which cannot react according to the elimination-addition (sulphene) mechanism.The reaction enthalpy of the alkaline hydrolysis of four individual alkane sulphochlorides was determined by a simple calorimetric apparatus; the average value amounts to δRH = -239 kJ mol-1.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220616

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

40

Electronic Resource

Spinmarkierte Oligopeptide als substratanaloge Inhibitoren der Leucinaminopeptidase (1980)

Fittkau, Siegfried ; Damerau, Werner

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 1032-1038

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Spin Labeled Oligopeptides as Substrate Analogous Inhibitors of Leucine AminopeptidaseThe synthesis of L-Thr(But)-(L-Phe)n-SL peptides C-terminal labeled with the nitroxide spin label 2,2,5,5-tetramethyl-3-amino-pyrrolidin-1-oxyl, is described and e.s.r. parameters of the labeled compounds are presented. As shown by e.s.r. spectroscopy studies Thr(But)-Phe-SL is a competitive inhibitor of the leucine aminopeptidase and is bound by the enzyme with high affinity.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220621

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

41

Electronic Resource

Ein einfaches Verfahren zur Herstellung von 1,2-Di-O-hexadecylglycero-3-phosphorsäure (1980)

Kertscher, P. ; Rüger, H.-J. ; Nuhn, P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 1067-1068

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: A Simple Method to Prepare 1,2-Di-O-hexadecylglycero-3-phosphate

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220626

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

42

Electronic Resource

Darstellung von trans-4-Diphenylphosphinyl-stilbenen (1980)

Gloyna, D. ; Alder, L. ; Henning, H.-G. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 237-246

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Synthesis of trans-4-Diphenylphosphinyl StilbenesThe reaction of 4-tolyl-diphenylphosphine oxide with N-bromosuccinimide results in 4-diphenylphosphinyl benzylbromide 5 which can be easily converted to (4-diphenylphosphinyl)-benzyl triphenylphosphonium bromide 6 and (4-diphenylphosphinyl)-benzyl diphenylphosphine oxide 7, respectively. In the presence of strong bases 6 and 7 react with aromatic aldehydes 8 to the 4-diphenylphosphinyl substituted stilbenes 1. The yields depend on the nature of base and solvent. The trans configuration of 1 is determined by i.r. and 1H-n.m.r. measurements.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220209

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

43

Electronic Resource

Untersuchungen zur Sulfochlorierung von Paraffinen. VI. Untersuchungen über die Sulfochlorierung von definierten Alkylchloriden (1980)

Helwig, D. ; Pritzkow, W. ; Radeglia, R. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 281-290

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Studies on Sulphochlorination of Paraffins. VI. Studies on the Sulphochlorination of Individual Alkyl ChloridesThe products of sulphochlorination of individual C2-C7 alkyl chlorides were studied by means of 1H- and 13C-n.m.r. spectroscopy. Gaschromatographic determination of the isomers formed was possible after the reaction of the chloroalkane sulphochloride mixture with dimethyl amine in ether. In no case geminal chloroalkane sulphochlorides were formed. Vicinal chlorosulphochlorides are formed, but substitution in greater distance from the chlorine is preferred if possible. Thus higher alkyl chlorides yield only very little amounts of vicinal chloroalkane sulphochlorides. The relative rates of sulphochlorination of alkyl chlorides were determined by competitive reactions.

Additional Material: 10 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220214

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

44

Electronic Resource

Possible psychopharmacological agents. XPart IX, Pharmazie, In press (1979).. Synthesis of Some Fluorine Containing Indole-2,3-dione Derivatives (1980)

Joshi, K. C. ; Pathak, V. N. ; Chand, P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 314-320

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Potentielle Psychopharmaka. X. Synthese einiger fluorhaltiger Indol-2,3-dion-Derivate

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220218

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

45

Electronic Resource

Synthese und Eigenschaften der Azomethine von α-Amino-N-heterocyclen (1980)

Bödeker, J. ; Courault, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 336-342

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Synthesis and Properties of Azomethines from α-Amino-N-heterocycles. Synthesemöglichkeiten unter besonderer Berücksichtigung der Staudingerschen Iminophosphoranmethode

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220222

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

46

Electronic Resource

Cyclisierungsreaktionen β,γ-ungesättigter Kohlensäurederivate. III. Zum massenspektrometrischen Fragmentierungsverhalten ausgewählter Oxazolidin-2-one, Thiazolidin-2-one und Thiazolidin-2-thione (1980)

Remane, H. ; Widera, R. ; Mühlstädt, M.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 329-335

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Cyclization Reactions of β,γ-Unsaturated Derivatives of Carbonic Acid. III. Mass Spectrometric Fragmentation of Some Oxazolidine-2-ones, Thiazolidine-2-ones, and Thiazolidine-2-thiones

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220221

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

47

Electronic Resource

Untersuchungen über die Autoxidation von cis- und trans-β-Methylstyren (1980)

Fuchs, K. P. ; Pritzkow, W.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 353-361

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Studies on the Autoxidation of cis- und trans-β-Methyl StyreneIn the autoxidation of cis- and trans-β-methyl styrene at temperatures between 80 and 120°C the C=C-double bond is preferably attacked: 35-60% of epoxides and their consecutive products and 25-50% of benzaldehyde are obtained. Products of allylic oxidation are formed only with yields lower than 1%; high-boiling or polymeric products, respectively, which could not be detected gaschromatographically are formed with yields lower than 20%. The ratio of cis- to trans-epoxides in the case of cis-β-methyl styrene oxidation amounts to about 0.04, in the case of trans-β-methyl styrene oxidation this ratio is about 0.01.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220302

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

48

Electronic Resource

Amines as Dehalogenating Agents. IV. Hydrocarbons, N-bornyl- and N-isobornylaniline formation in the reaction between 3-bromocamphor and N-methylaniline (1980)

Giumanini, Angelo G. ; Musiani, Marco M.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 423-428

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Amine als Dehalogenierungsreagenzien. IV. Kohlenwasserstoff-, N-Bornyl- und N-Isobornylanilinbildung bei der Reaktion zwischen 3-Bromcamphor und N-MethylanilinN-Methylanilin (4) reagiert bei 200°C im Vergleich zu N,N-Dimethyl-anilin entweder mit 3-Bromcamphor (2) oder Camphor (3) zu den Kohlenwasserstoffen, Camphen 5 und Tricyclen 6 und N-Bornylanilin (exo-endo-Isomers 7). Bei der Reaktion mit 3 ist Säurekatalyse not-wendig. Untersuchungen zum Mechanismus erlauben es, anzunehmen, daß Camphoranil 8 ein gemeinsames Zwischenprodukt für alle Produkte und 4 der H-Donator in den Reduktionsstufen ist, auf der Grundlage von kinetischen und stereochemischen Beweisen und unabhängigen chemischen Experimenten.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220312

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

49

Electronic Resource

Komplexbildung eines linearen Amin-Epoxid-Polyadduktes mit Bariumrhodanid (1980)

Hörhold, H.-H. ; Klemm, D. ; Klee, J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 445-449

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Complex Formation of a Linear Amine Epoxide Polyadduct with Barium RhodanideN,N′-Dibenzyl-3,6-dioxa-octanediamine-1,8 and the linear polyadduct (Mn = 8000) obtained from this amine and diglycidyl ether of bisphenol A form 1:1 complexes with barium rhodanide in organic solutions. This result is of importance for the surface chemistry of epoxide resins in adhesive processes and for the interaction with mineral fillers.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220315

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

50

Electronic Resource

Condensation of Aryl Benzyl Ketones with Dimethyl Diglycollate (1980)

El-Newaihy, M. F. ; Salem, M. R. ; Enayat, E. I. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 42-48

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Kondensation von Arylbenzylketonen mit DimethyldiglycollatPhenyl-, p-Tolyl- und p-Chlorphenyl-benzylketone kondensieren mit Dimethyldiglycollat in Gegenwart von Natriumhydrid in guten Ausbeuten zu den entsprechenden Z-Halbestern 2a-e. Struktur und Konfiguration der Halbester wurde durch chemische und spektroskopische Befunde gestützt.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220107

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

51

Electronic Resource

Dienoligomerisierung. XVAus der Dissertation A von F. Meier, Bergakademie Freiberg 1978. Palladiumkomplexkatalysierte Telomerisierung von Butadien mit Aminen und Dimerisierung in Gegenwart von Ketoximen (1980)

Beger, J. ; Meier, F.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 69-80

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Diene Oligomerization. XV. Palladiumcomplexcatalyzed Telomerization of Butadiene with Amines and Dimerization in the Presence of KetoximesButadiene reacts with primary or secondary amines and with the homogeneous catalytic system bis-acetylacetonatopalladium-(II)/triphenylphosphine to form 1-amino-octa-2,7-dienes. The rate and the selectivity of the reaction increase in presence of cocatalysts as triarylphosphates instead of triphenylphosphine and if the reaction proceeds in a protic media - in alcohols, water or lower carboxylic acids. A number of 1-aminoocta-2,7-dienes were prepared. If oximes act as organic nitrogen compounds, only n-octa-1,3,7-triene is selectively formed. Schiff' bases aldolisate under the conditions of the reaction.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220110

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

52

Electronic Resource

Synthese und spektroskopische Eigenschaften von neuen Tetrahydrothiopyrano [2,3-d]-thiazol-Derivaten (1980)

Ead, Hamed Abdel Reheem ; Nazmi, Abdel Latif Kassab ; Hubert, Köppel ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 155-160

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Studies on Synthesis and Spectroscopic Properties of New Tetrahydrothiopyrano [2,3-d]-thiazole-Derivatives

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220120

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

53

Electronic Resource

Acetals and ethers. I. Sulfur Dioxide as a Catalyst in Acetal Synthesis from aliphatic aldehydes or ketones and alcohols (1980)

Burczyk, Bogdan

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 173-176

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Acetale und Ether. I. Schwefeldioxid als Katalysator in der Acetal-Synthese aus aliphatischen Aldehyden oder Ketonen und Alkoholen

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220123

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

54

Electronic Resource

Synthesis of Phosphonic Analogues of Morphactines (1980)

Gancarz, Roman ; Wieczorek, Jan S.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 213-222

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Zur Synthese von Phosphono-Analoga des Morphaktins9-Aminofluorenphosphonsäuren (Morphaktine) entstehen durch Addition von Diethylphosphit an 9-Imino-fluorenderivate. Die primär erhaltenen Ester werden zu den korrespondierenden Säuren hydrolysiert, eine Reihe der Aminophosphonsäuren zerfallen unter den Bedingungen der Hydrolyse in 9-Fluorenonderivate und die entsprechenden Amine.

Additional Material: 5 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220206

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

55

Electronic Resource

Dienoligomerisierung. XVI. Nickelkomplexkatalysierte Codimerisierung von isomeren Octatrienen mit EthenDiese Untersuchungen wurden in der Zeit von September 1973 bis Juli 1975 an der Sektion Verfahrenschemie der TH „Carl Schorlemmer“ Leuna-Merseburg durchgeführt. (1980)

Füllbier, H. ; Gaube, W. ; Lange, R. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 655-662

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Dienoligomerization. XVI. Catalytic Codimerization of Isomeric Octatrienes with Ethene by Nickel ComplexesThe isomeric octatrienes (n-octa-1,3c,t,7-triene 1, n-octa-1,3c,6t-triene 2 and 3-methylhepta-1,4t,6-triene 3), which are easily obtained in high yields by transition metal catalysed dimerization of butadiene, react with ethene 4 in the presence of the cationic tetrakis-(triethylphosphite)-nickelhydride complex 5 to the dodimers 3-methylnona-1,4c,t,8-triene 6, 4-vinylocta-2c, 7-diene 7, 3-methyl nona-1,4c,t,7t-triene 8, 4-vinylocta-2c,6t-diene 9, 3,6-dimethylocta-1,4c,t,7-triene 10 and 3-methyl-4-vinylhepta-1,5c-diene 11. The concentration-time dependence and a possible reaction mechanism of the codimerization are discussed and the structure data of the reaction products are reported.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220418

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

56

Electronic Resource

Massenspektroskopie von Naturstoffen. VII. Massenspektroskopische Untersuchungen von C-3-substituierten stickstoffhaltigen Friedelanen (1980)

Schmidt, J. ; Huneck, S. ; Ihn, W.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 695-700

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Mass Spectroscopy of Natural Products. VII. Mass Spectroscopic Studies of C-3-substituted Nitrogen Containing Friedelanes

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220424

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

57

Electronic Resource

E.P.R. study on Cr(V) Complex Formation with thenoyltrifluoracetone and some monothio-β-diketones in nonaqueous medium (1980)

Russev, P. ; Bontchev, P. R. ; Mitewa, M. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 705-710

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: EPR-Untersuchungen zur Komplexbildung von Cr(V) mit Thenoyltrifluoraceton und einigen Monothio-β-diketonen in nichtwäßrigem MediumEs wurde die Komplexbildung von Cr(V) mit Thenoyltrifluoraceton und einigen Monothio-β-diketonen in Ethylalkohol, Acetonitril, Dimethylformamid, Formamid, Dimethylsulfoxid und Hexamethylphosphortriamid untersucht. Mittels EPR-Spektroskopie wurde gefunden, daß Anzahl und Konzentration der Cr(V)-Komplexe vom Lösungsmittel abhängen und mit steigender Donorzahl des Lösungsmittels zunehmen. Entsprechend NMR-Untersuchungen koordinieren Lösungsmittelmoleküle am Cr(V). Ein Reaktionsschema zur Bildung von Cr(V) aus Cr(VI) wird vorgeschlagen.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220502

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

58

Electronic Resource

Synthesen von trail-Pheromonen der Pharaoameise (Monomorium pharaonis(L.)) (1980)

Schmitz, Ernst ; Sonnenschein, Helmut ; Gründemann, Christel

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 261-272

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Syntheses of trail Pheromones of the Pharao Ant (Monomorium pharaonis (L.))Hofmann-Löffler-reaction, starting from 5-amino-tridecane yields pyrrolidine mixtures containing 2-butyl-5-pentyl-pyrrolidine 1, known as a trail pheromone of the Pharao ant. An analogous reaction of 7-amino-pentadecane leads to 2-hexyl-5-pentyl-pyrrolidine 2 as a mixture with an isomer. Definite 2,5-dialkyl-pyrrolidines are obtained by Seebach alkylation from N-nitroso-pyrrolidines e.g. 1, 2 or 3, the latter with an unsaturated side chain. Change of reaction conditions led to 2,2-dialkyl-pyrrolidines. Dehydrogenation followed by hydrogenation converts a mixture of cis-trans-isomers of 1 into definite cis-compound 1a. Trails of these pyrrolidines are followed by Pharao ants.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220212

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

59

Electronic Resource

Untersuchungen zum UV/Vis-Spektralverhalten von Azofarbstoffen. IVIII. Mitt.: J. prakt. Chem. 322, 49 (1980).. Zum Einfluß von Lösungsmitteln auf die Farbbande von Azobenzenen (1980)

Mustroph, H. ; Epperlein, J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 305-313

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Studies on UV/VIS Absorption Spectra of Azo Dyes. IV. Solvent Effects on the Visible Absorption Band of AzobenzenesSolvent effects on \documentclass{article}\pagestyle{empty}\begin{document}$ \begin{array}{*{20}c} \sim \\ {\nu _{\max } } \\ \end{array} $\end{document} values of substituted azobenzenes are studied and correlated with solvent polarity parameters. Poor correlations of \documentclass{article}\pagestyle{empty}\begin{document}$ \begin{array}{*{20}c} \sim \\ {\nu _{\max } } \\ \end{array} $\end{document} values with functions of ∊ and n of solvents are found. A comparison of spectral data with the ET scale shows a much poorer correlation. The correlation with the ET values are significantly better if the protic solvents are excluded. The best of the tested relationships was found with the empirical solvent parameters π*. Values of S in the equation \documentclass{article}\pagestyle{empty}\begin{document}$\begin{array}{*{20}c} \sim \\ {\nu _{\max } } \\\end{array} = {\rm S}\pi ^{\rm *} {\rm + }\begin{array}{*{20}c} \sim \\ {\nu 0} \\\end{array}, $\end{document} depend on the dye structure. It is found a relationship between S and the difference of quantum chemical calculated dipol moments in the first exited singlet (μ(S1)) and in the ground state (μ(S0)) of the dyes.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220217

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

60

Electronic Resource

Synthesis of some newly synthesized substituted 3-(4′-Aryl substituted carbamidoacetyl) aminomethyl-4(3H)quinazolones as CNS depressant compounds (1980)

Mukerji, D. D. ; Nautiyal, (Miss) S. R. ; Prasad, C. R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 855-858

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Synthese neuartiger substituierter 3-(4′-arylsubstituierter carbamidoacetyl)aminomethyl-4(3H) chinazolone als CNS-Depressoren

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220524

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

61

Electronic Resource

Benzophenon-photoinduzierte Oxydationen von Benzylarylethern und aromatischen Lösungsmitteln (1980)

Baumann, H. ; Timpe, H.-J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 865-871

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Benzophenone Photoinduced Oxidation of Benzyl Aryl Ether and Aromatic Solventsα-Ether radicals formed in the photoreaction of benzophenone with benzyl phenyl ether were oxidized in benzene solution to phenol, benzaldehyde and phenylbenzoate. A mechanism including an instable intermediate α-ether hydroperoxide is discussed with the help of kinetic and CIDNP results. The quantum yields of the oxygen consumption show a linear dependence on the ether concentration. They are much higher in the pure solvent benzene than expected from the quenching and deactivation processes. This agrees with the existence of a biradicalic adduct of triplet benzophenone with aromatic solvents and shows that these solvents are far from being inert under these conditions.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220602

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

62

Electronic Resource

Darstellung und Reaktionen von 2-Arylazo-2-nitro-keten-aminalen (1980)

Schäfer, H. ; Gewald, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 87-93

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Synthesis and Reactions of 2-Arylazo-2-nitro-keten AminalsN,N′-Disubstituted 1-nitro-2,2-diamino ethylenes 1 undergo azo-coupling to form the title compounds 2. Their treatment with oxalyl chloride yields the imidazolidin-4,5-dione-derivatives 4. 2 react with phosgene and thiophosgene to form 6-nitro-2,4-diaryl-5-arylimino-2,3,4,5-tetrahydro-1,2,4-triazin-3-ones 5 and -thiones 6 respectively. From 2 and N-(dichloromethylene)-arylsulfoamides the 6-nitro-2,4-diaryl-5-arylimino-3-aryl-sulfonylimino-2,3,4,5-tetrahydro-1,2,4-triazines 7 arise. The reduction of 2 yields the substituted oxalic amidines 9

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220112

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

63

Electronic Resource

Konformationsuntersuchungen mit Hilfe der 13C-NMR-Spektroskopie. IVIII. Mitt.: G. Mann, E Kleinpeter u. H. Werner, Org. Magn. Reson. II, 561 (1978). Additive Berechnung der 13C-chemischen Verschiebungen in 2-Brom-cycloalkanolen und 2-Brom-1-methoxy-cycloalkanen unterschiedlicher Ringgröße (1980)

Kleinpeter, E. ; Haufe, G. ; Borsdorf, R.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 125-130

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Conformational Investigations by Means of 13C-N.M.R.Spectroscopy. IV. Additive Calculation of the 13C-N.M.R. Chemical Shifts in 2-Bromo-cycloalkanoles and 2-Bromo-1-methoxy-cycloalkanes of Different Ring SizeThe 13C-n.m.r. spectra of a series of bromo-cycloalkanes, cycloalkanoles, methoxy-cycloalkanes, trans-2-bromo-cycloalkanoles and trans-2-bromo-1-methoxy-cycloalkanes (ring size n = 5, 6, 7, 8, 12) as well as cis-2-bromo-cyclododecanol and cis-2-bromo-1-methoxycyclododecane are obtained and assigned. The 13C-chemical shifts of the monosubstituted compounds have been used to estimate the substituent effects of bromo, hydroxy and methoxy groups to the α-, β- and γ-position. Using these shift parameters, the 13C-chemical shifts of the vicinal disubstituted compounds are calculated in an additive incremental manner. These 13C-chemical shifts have been compared with the experimental values and the differences are discussed with respect to the magnitude of the deviations from additivity with the dimension of steric and electronic interaction of the vicinal substituents.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220115

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

64

Electronic Resource

Azine Derivatives of Titanium(IV) and Zirconium(IV) (1980)

Sharma, R. K. ; Tandon, J. P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 161-168

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Azinderivate des vierwertigen Titans und Zirkoniums

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220121

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

65

Electronic Resource

Spektroskopische und Dipolmoment-Untersuchungen an Halogenfluorid-Additionsprodukten der Chalkone (1980)

Weber, Fritz Gerd ; Giese, Hartmut ; Köppel, Hubert

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 177-185

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Spectroscopical and Dipole Moment Investigations of Halogen Fluoride Addition Products of ChalconesChalcone halogen fluoride addition products 1-3 are investigated in the i.r. and 1H-n.m.r. spectroscopy field as well as in the substituent dependence of spectral parameters and molecular dipole moment. The assign of configuration and conformation on basis of 1H-n.m.r. spectroscopy and dipole moments are discussed.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220202

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

66

Electronic Resource

Organische Phosphorverbindungen. XIII. Reaktion vinyloger Chlormethylenimmoniumsalze mit Phosphorigsäuretrialkylestern (1980)

Schneider, Peter ; Fischer, Gerhard W.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 229-236

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Organic Phosphorus Compounds. XIII. Reaction of Vinylogous Chloromethylene Immonium Salts with Trialkyl Phosphites3-Chloropropenylidene immonium salts of the type Cl—CAr=CH—CH=NMe2⊕X⊖ don't react like chloromethylene immonium salts Cl—CH=NMe2⊕X⊖ with trialkyl phosphites according to the classical MICHAELIS-ARBUSOV principle (RO)3P + R′Cl → (RO)2P(O)R′ + RCl but lead to salts of 1-dimethylaminophosphonates (RO)2P(O)—CH(NMe2 · HX)—CH=CClAr the structure of which is confirmed by two independent syntheses. Some characteristic reactions of the free dimethylaminophosphonates are described.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220208

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

67

Electronic Resource

Stereochemische Untersuchungen mit der 13C-NMR-Spektroskopie. V. Methyl- und tert.-butylsubstituierte Cyclohexane (1980)

Jancke, H. ; Werner, H.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 247-252

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Stereochemical Investigations by Means of 13C-N.M.R.-Spectroscopy. V. Methyl- and tert.-Butyl-substituted CyclohexanesThe 13-chemical shifts of some cyclohexanes with methyl and tert. butyl as substituents in configurational different positions are discussed. The substituent effects of the methyl and t-butyl groups, respectively, on the C-atoms of the ring are different and can be explained with the aid of long range (γ and δ) steric interactions. It is shown, that in all investigated compounds a twisted conformation of the ring is prefered instead of an axial arrangement of a t-butyl group.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220210

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

68

Electronic Resource

Cyansäureester. 29. Benzoxazolin-thion-N-imidsäureester und ihre Folgereaktionen (1980)

Martin, D. ; Wenzel, A.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 253-260

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Cyanic Acid Esters. 29. Benzoxazoline-thione-N-imid Esters and Their Consecutive ReactionsOxazoline-thiones-(2) and aryl cyanates react to form the corresponding isoureas 4. These compounds are remarkably stable against electrophilic reagents. The aminolysis of 4 proceeds two pathways: a transformation of the imid ester residue to the amin and a ring opening reaction by attack of the amin to the C=S-bond. The hydrazinolysis causes a ring-transformation of the oxazoline- to the 1,3,4-triazole system.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220211

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

69

Electronic Resource

Untersuchungen zur Sulfochlorierung von Paraffinen. VII. Untersuchungen über die Chlorierung von definierten Alkansulfochloriden (1980)

Krebes, S. ; Pritzkow, W. ; Schmidt-Renner, W. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 291-294

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Studies on Sulphochlorination of Paraffins. VII. Studies on the Chlorination of Individual Alkane SulphochloridesThe products of the chlorination of individual C2-C6 alkane sulphochlorides were studied by means of 13C-n.m.r. spectroscopy. In no case a geminal chloro sulphochloride could be found, and only in very few cases chlorination at vicinal C—H-bonds took place. As in the sulphochlorination of alkane sulphochlorides the C—H-bonds geminal and vicinal to the sulphochloride group are strongly descativated. The results of 13C-n.m.r. analyses were confirmed by the results of gaschromatography of the sulphonic acid dimethyl amides, formed by the reaction of the chlorination mixtures with dimethyl amine.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220215

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

70

Electronic Resource

Notiz zur Synthese von β-Hydroxyethanphosphonsäure (1980)

Gloede, J. ; Weigt, E. ; Gross, H.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 327-328

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Note on the Synthesis of β-Hydroxyethanephosphonic Acid

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220220

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

71

Electronic Resource

Synthesis of Some Derivatives of 4-Dialkylamino-2-aminopyridine (1980)

Mörkved, Eva H. ; Cronyn, Marshall W.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 343-347

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Zur Synthese einiger Derivate des 4-Dialkylamino-2-aminopyridins

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220223

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

72

Electronic Resource

Substituierte 1,4,2-Dithiazolin-3-yliden-aroylacetonitrile (1980)

Dehne, H. ; Krey, P.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 407-410

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Substituted 1,4,2-Dithiazoline-3-ylidene-aroylacetonitrilesA convenient method for the preparation of new 2,5-disubst-1,4,2-dithiazoline-3-ylidene-aroylacetonitriles 4 is presented. The compounds 4 are formed during reaction of substituted thioacetamides 1 with α-bromo-α-thiocyanatoketones 2. The mechanism of formation as well as the mass and i.r.-spectra of the synthesized compounds are discussed.

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220309

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

73

Electronic Resource

Die Analytik von Kohlenwasserstoffen mit Hilfe der Massenspektrometrie. VIII. Stereochemische Einflüsse auf die Fragmentierung einiger cis-trans-isomerer Bicyclo(m.n. O)alkane (1980)

Herzschuh, R. ; Mann, G.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 450-456

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Analysis of Hydrocarbons by Means of Mass Spectrometry. VIII. The Fragmentation of Cis-Trans Isomeric Bicyclo (m.n. O)alkanesThe mass spectra of the cis-trans isomeric bicyclo(m.n. O)alkanes are discussed. The molecular ion intensities and the ring strain energies of the bicycloalkanes correlate.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220316

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

74

Electronic Resource

Vinyloge Acylverbindungen. XIX. Vinyloge Acylgruppenwanderung am 2-Aminophenol. Ein Beitrag zum Isomerisierungsmechanismus gemischter Diacylderivate des 2-Aminophenols (1980)

Fischer, Gerhard W.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 99-124

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Vinylogous Acyl Compounds. XIX. Vinylogous Acyl Group Migration in 2-Aminophenol. A Contribution to the Isomerization Mechanism of Mixed Diacyl Derivatives of 2-AminophenolStarting with 2-acylaminophenols 5 and 2-(2-acylvinylamino)-phenols 6 the N-acyl O-acylvinyl derivatives 7 of 2-aminophenol and their N-acylvinyl O-acyl isomers 8 were prepared and characterized. These vinylogous acyl compounds are able to isomerize in the same manner as simple O,N-diacylated 2-aminophenols 3 and 4, which under suitable conditions easily rearrange to give a dynamic equilibrium 3 ⇌ 4. Contrary to 3 and 4, however, the isomerization of 7 and 8 can be followed directly by spectroscopic methods, so that vinylogs of this type are useful model systems for studying acyl group migrations in 2-aminophenol. Kinetic measurements show that the mutual rearrangement of 7 and 8 is a reversible general based catalyzed reaction, being first order with respect to substrate and catalyst. The isomerization of the N-acetyl derivatives 7a-h as well as the N-benzoyl derivatives 7i-p results in strictly linear HAMMETT correlations with positive reaction constants ϱ. In the case of 7a-h the equilibrium constant K and the forward and reverse velocity constants k1 and k2 (including activation parameters) could be determined. The kinetic investigations and additional nonkinetic experiments indicate that the catalyst acts as proton acceptor and not - as hitherto supposed - as acyl group transferring nucleophile. Based on the findings an isomerization mechanism for mixed diacyl derivatives of 2-aminophenol is suggested.

Additional Material: 6 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220114

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

75

Electronic Resource

Theoretische Untersuchungen zum elektrophilen Angriff. VIII. Das protonierte Pyrrol (1980)

Illek, B. ; Grimmer, M. ; Heidrich, D.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 147-151

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Theoretical Studies to the Electrophilic Attack. VIII. The Protonated PyrroleThe potential surface of protonated pyrrole was analysed for minima and saddle points of first and higher order by special numerical methods. The calculations were carried out on the basis of semiempirical methods tested in the past on related cationic systems.The relative energies of face protonated pyrrole, the σ-complexes and H-bridged structures were compared with recent results on the benzene-H+ system to interprete the H-shifts in the cation and the intermediates in the proton exchange reaction. Theoretical suggestions for solvatation effects are considered in the discussion. One of the most striking results is the high barrier for the H-shift from the N-protonated form to the α-position.

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220118

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

76

Electronic Resource

The Behaviour of 4,5-Dihydropyridazin-3(2H)-one Derivatives towards Organometallic Compounds (1980)

Fateen, A. K. ; Ismail, M. F. ; Kaddah, A. M. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 617-622

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Zum Verhalten von 4,5-Dihydropyridazin-3(2H)-on-Derivaten gegenüber organometallischen VerbindungenPhenyllithium reagiert mit 6-Aryl- und 6-Aryl-4-phenyl-4,5-dihydropyridazin-3(2H)-onen (1) unter 1,2-Addition an die Azomethin-Bindung zu Verbindungen des Typs 2.N-Phenylderivate dieser Pyridazinone reagieren mit Phenyllithium oder Phenylmagnesiumbromid analog 6, während N-Methylderivate mit diesen Reagenzien zu den Pyridazinderivaten 10 reagieren. Die Struktur der Produkte wird durch IR-Spektroskopie und unabhängige Synthese gestützt.

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220412

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

77

Electronic Resource

Zur Stereochemie der Ringöffnung von trans-1,2-Diphenylcyclopropanen mit Quecksilber(II)salzen (1980)

Bandaev, S. G. ; Šabarov, Yu. S. ; Hantschmann, A. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 643-648

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Stereochemistry of Ring Opening of trans-1,2-Diphenylcyclopropanes by Mercury(II) saltsReaction of trans-1,2-diphenylcyclopropanes 1 and 2 with mercuric salts yields diastereomeric 1,2-diphenylpropanole derivatives. The ratio of erythro and threo diastereomers depends on the nature of substituents and solvent properties.A mechanism is proposed to explain the different product ratios.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220416

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

78

Electronic Resource

Doppelte magnetische Nichtäquivalenz in chiralen Dineopentyl-, Dibenzyl-, Di(tribromethyl)- und Diethylmalonaten (1980)

Brink, M. ; Schjånberg, E.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 685-694

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Double Magnetic Nonequivalence in Chiral Dineopentyl, Dibenzyl, Di(tribromoethyl) and Diethyl Malonates

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220423

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

79

Electronic Resource

Turro, N. J.: Modern Molecular Photochemistry. XI, 628 S. mit zahlr. Abb., 23 × 16 cm. Menlo Park, California, Reading, Massachusetts, Don Mills, Ontario-Sydney: The Benjamin/Cummings Publ. Co., Inc. 1968. Kunststoff (1980)

Becker, H. G. O.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 704-704

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220426

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

80

Electronic Resource

Zur Berechnung des HLB-Wertes isomerer und substituierter Alkansulfonate (1980)

Sowada, Rudolf

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 723-729

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Concerning the Calculation of HLB Values of Isomeric and Substituted Alkane SulphonatesBased on LIN's hydrophobicity index HLB values have been calculated for the isomeric dodecane sulphonates and some substituted pentadecane-1-sulphonates.

Additional Material: 3 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220505

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

81

Electronic Resource

Zur Beschreibung der Wechselwirkung zwischen p-substituierten Benzaldehyden und NMR-Verschiebungsreagenzien (1980)

Piegsa, U. ; Radeglia, R. ; Doerffel, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 742-750

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Investigations to the Interaction between p-Substituted Benzaldehydes and N.M.R.-Shift ReagencesThe influence of n.m.r. shift reagents (Eu(fod)3 and Pr(fod)3) on the chemical shifts of p-dimethylaminobenzaldehyde has been investigated at 13C and 1H-n.m.r. spectroscopy. The induced shifts of the protons are quantitatively explained on the basis of pseudocontact interaction. In 13C-n.m.r. spectra significant contact interactions have also been noted. The 13C induced shifts have been separated into pseudocontact and contact contributions by two different methods. Calculations of relative equilibrium constants in mixtures have been carried out for p-dimethylaminobenzaldehyde, p-nitrobenzaldehyde, anisaldehyde and benzaldehyde. The relative equilibrium constants show a good correlation with the Hammett substituent constants.

Additional Material: 6 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220508

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

82

Electronic Resource

Substituenteneffekte in den 13C-NMR-Spektren von diastereomeren Chalkondihalogeniden. IV. Substituenteneinflüsse in den 13C-NMR-Spektren von 2-Chlor-3-brom-1,3-diarylpropan-1-onen und anderen Chalkondihalogeniden (1980)

Weber, Fritz Gerd ; Radeglia, Reiner ; Altenburg, Wolfgang

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 849-854

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Substituent Effects in 13C-N.M.R. Spectra of Diastereomeric Chalcone Dihalogenides. IV Influences of Substituents in 13C-N.M.R. Spectra of 2-Chloro-3-bromo-1,3-diaryl-propan-1-ones and Other Chalcone Dihalogenides

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220523

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

83

Electronic Resource

Masthead (1980)

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980)

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220601

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

84

Electronic Resource

Chemistry and application of organic isocyanates. II. Application of tolylene-2,4-diisocyanate for the Syntheses of New Surface-Active Urethanes of poly(oxyethylene)-sucrose and poly(oxyethylene)glucose (1980)

Lesiak, T. ; Iwaszkiewicz-Nowak, J.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 884-894

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Chemie und Anwendung von organischen Isocyanaten. II. Verwendung von Toluylen-2,4-diisocyanat für die Darstellung von neuen grenzflächenaktiven Poly(oxethylen)saccharose- und Poly(oxethylen)glucoseurethanenDurch Synthese von 3-Isocyanato-4-methyl-phenylcarbaminsäurealkylestern 1-5 mit Poly(oxethylen)sacchariden entstehen bisher unbekannte, grenzflächenaktive Poly(oxethylen)saccharose- und Poly(oxethylen)glucoseurethane 6-23.In Abhängigkeit von der Konzentration wurden die Oberflächenspannung und die Schaumfähigkeit dieser Verbindungen bestimmt und mit den Standards Na-Dodecylsulfat und K-Oleat verglichen.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220605

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

85

Electronic Resource

Über die Autoxidation einiger monocyclischer Olefine (1980)

Blau, K. ; Müller, U. ; Pritzkow, W. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 915-932

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Studies on the Autoxidation of Some Monocyclic OlefinsThe autoxidations of cyclopentene, cyclohexene, cycloheptene, cyclooctene, cycloocta-1,5-diene, 1-methylcyclopentene, 1-methylcyclohexene, 1-methylcycloheptene, 1-methylcyclooctene, methylene cyclopentene, and methylene cyclohexene with pure oxygen under normal pressure were studied. The epoxides formed were determined gaschromatographically. In most cases also the products of allylic oxidation were analyzed and their structures elucidated after reduction to the corresponding allyl alcohols. The portions of high boiling or polymeric products which could not be detected gaschromatographically and also the real yields of epoxides were determined by balance experiments in the presence of inert internal standards.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220609

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

86

Electronic Resource

Zur Rolle von EDA-Komplexen bei kationischen Polymerisationen. VIII. Zur Charge-Transfer-Wechselwirkung von bπ-Donatoren mit organischen Kationen in Lösung (1980)

Heublein, G. ; Spange, St.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 949-962

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: On the Role of EDA-complexes in Cationic Polymerization. VIII. The Charge-Transfer-Interaction of bπ-Donors with Organic Cations in SolutionThe interaction of 25 aromatic bπ-donors with organic cations of the type (RC6H4)3 C⊕X⊖ (R = —CH3, —C(CH3)3, —OCH3, —H, —Cl, —I, —NO2; X = BF4⊖, AsF6⊖, SbCl6⊖, FeCl4⊖) is investigated by means of u.v.-spectroscopy. The influence of the dissociation on the charge transfer energy will be discussed. With the decreasing concentration of the salt the charge transfer band is hardly shifted at longer wave length. The charge transfer energy can be described as a linear function of structural parameters (i.e. σp of R; Ip of the donor and reciprocal radius of the anions, respectively).The influence of the solvent is dependent on both the donicity and dielectric factors.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220612

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

87

Electronic Resource

Perrin, D. D.: Stability constants of metal-ion complexes. Part B: Organic ligands. 2. Suppl. Z. 2. Aufl. 1262 S. mit 2555 Tab., Format 27,3 × 18,8 cm. Oxford UK/Elmsford, NY, USA: Pergamon Press 1979. (Chemical Data Series No 22 IUPAC Publication) 150 $ (1980)

Hoyer, E.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 527-527

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220331

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

88

Electronic Resource

Partialsynthesen von Cardenoliden und Cardenolid-Analogen. I. α,β- und β,γ-ungesättigte Lactonring-methylierte CardenolideAuszugsweise vorgestellt auf dem Symposium über Gewinnung und biologische Wirksamkeit potentieller Arzneimittel, Magdeburg, 12.-15. Nov. 1978 (Kurzreferat [1]). (1980)

Lindig, Claus ; Repke, Kurt

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 991-1002

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Partial Syntheses of Cardenolides and Cardenolide Analogues. I. α,β- and β,γ-Unsaturated Lactone Ring-Methylated CardenolidesBase-catalyzed methylation of digitoxigenin 1a with methyl iodide and sodium hydride in DMF leads to the α,β-unsaturated cardenolides 2-5 and, after rearrangement of the C=C-double bond, to the β,γ-unsaturated cardenolides 6 and 7. Opening of the lactone ring results in the formation of 8. Allylic oxidation of 4b affords the 14,21-epoxide 10. Only the 22-methyl derivative 4a and its 3-O-tridigitoxoside 4d show strong biological effectivity, whereas methylation at 21R- or 21S-position results in considerable loss in activity.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220617

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

89

Electronic Resource

Partialsynthesen von Cardenoliden und Cardenolid-Analogen. II. Synthese von Cardenolid-analogen γ-Steroidyl-butenolidenAuszugsweise vorgestellt auf dem Symposium über Gewinnung und biologische Wirksamkeit potentieller Arzneimittel, Magdeburg, 12.-15. November 1978 (Pharmazie 34, 329 (1979)). (1980)

Theil, Fritz ; Lindig, Claus ; Repke, Kurt

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 1003-1011

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Partial Syntheses of Cardenolides and Cardenolide Analogues. II. Synthesis of Cardenolide-Analogous γ-Steroidyl-ButenolidesThe synthesis of the cardenolide-analogous stereoisomeric γ-steroidyl-butenolides 5 and 6 and of the γ-steroidyl-α-methyl-butenolide 13, starting from β-ketosulfoxide 3 by alkylation with methyl bromoacetate and methyl α-bromopropionate, respectively, followed by the sodium borohydride reduction of the alkylated intermediates is described. 1,3-dipolar addition of diazomethane to 5 followed by pyrolysis of butyrolactone-pyrazoline-adduct 11 yields γ-steroidyl-β-methyl-butenolide 10, the structural isomer of 13.

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220618

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

90

Electronic Resource

Molecular geometry and excited electronic states. III. Theoretical Study on Excited State Geometry and Fluorescence Properties of Fluoranthene (1980)

Sühnel, J. ; Kempka, U. ; Gustav, K.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 649-654

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Molekülgeometrie und angeregte Elektronenzustände. III. Theoretische Studie zur Geometrie angeregter Elektronenzustände und zu den Fluoreszenzeigenschaften von FluoranthenEs wurde die Gleichgewichtsgeometrie des Fluoranthens in den Sn-Zuständen (n = 0, 1, 2, 3, 4) durch Minimisierung der Gesamtenergie bezüglich aller Molekülkoordinaten berechnet. Fluoranthen ist in allen untersuchten Elektronenzuständen planar, zeigt aber bei Elektronenanregung bemerkenswerte änderungen der Bindungslängen. Unter Verwendung dieser Geometriedaten werden das Absorptionsspektrum und die Fluoreszenz aus dem tiefsten und aus höher angeregten Zuständen interpretiert. Die ungewöhnlich große Stokessche Verschiebung kann ohne Annahme eines nichtplanaren S1-Zustandes verstanden werden. Ihre Größe nimmt mit zunehmender Energie von Sn ab.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220417

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

91

Electronic Resource

Heterocycles with potential heterodienes. II. Bifunctional nitrones: Synthesis of New Heterocycles with Both Nitrone and Heterodiene Functions (1980)

Tacconi, G. ; Righetti, P. P. ; Desimoni, G.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 679-684

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Heterocyclen mit potentiellen Heterodienen. II. Bifunktionelle Nitrone: Synthese von neuen Heterocyclen mit Nitron- und Heterodienfunktion

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220422

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

92

Electronic Resource

Masthead (1980)

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980)

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220501

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

93

Electronic Resource

Syntheses and spectroscopic characterisation of some new 3,5-Bisaryl-2-pyrazoline Derivatives. II (1980)

Sayed, G. H. ; Kjøsen, H.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 716-722

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Synthese und spektroskopische Charakterisierung einiger neuer 3,5-Bisarylierter-2-pyrazolinderivate. IIDurch Kondensation von Hydrazin bzw. substituierten Hydrazinen mit Chalkonen wurden einige neue 3,5-bisarylierte-2-pyrazoline 4, 7-18 dargestellt.Bromierung des Pyrazolins 4 liefert das 4-Brompyrazol 20.Die Verbindungen wurden durch hochauflösende Massenspektrometrie, UV-, IR- und H-NMR-Spektroskopie charakterisiert.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220504

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

94

Electronic Resource

Reaktionen von Difluordichlormethan mit Kohlenwasserstoffen (1980)

Schmidt, H. ; Burtzlaff, Ch. ; Masuhr, H. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 751-760

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Reactions of Difluoridichloromethane with HydrocarbonsThe reaction of difluordichloromethane with different hydrocarbons between 150°C and 250°C yields the CFCl2-substituted hydrocarbons. Beside it the corresponding chlorides are formed. For the hydrocarbons studied the following sequence of reactivity against difluordichloro-methane was found. n-paraffins 〈 isoparaffins ≅ cycloparaffins 〈 alkylaromatics 〈 olefines.

Additional Material: 2 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220509

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

95

Electronic Resource

d-NMR-Untersuchung der behinderten Rotation am N—C(X)-Bindungsfragment. XII. Substituenteneffekte auf die C—N-Rotationsbarriere in unterschiedlich N-substituierten Carbamidsäure-O-ethylestern (1980)

Kleinpeter, E. ; Kretschmer, M. ; Borsdorf, R. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 793-797

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: d-N.M.R.-Investigation of the Restricted Rotation at the N—C(X)-Bonding Fragment. XII. C—N-Rotational Barrier in Different N-Substituted Carbamic Acid O-ethyl EstersThe 1H-n.m.r. spectra of a series of different N-substituted urethanes R1R2N-C(O)OC2H5 are studied at various temperatures. At low temperatures the syn/anti rotamers are assigned by using the LIS-values of the protons. The thermodynamic parameters ΔGC± of the restricted rotation about the partial C-N double bond are determined and discussed with regard to inductive, conjugative and homoconjugative effects of the N-substituents.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220513

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

96

Electronic Resource

Dreikomponentenreaktionen. XIX. Mitt: J. Beger, H. Schiefer, L.Schröder u. A.Zschunke, J.prakt. Chem 322, 610 (1980).. Bromchlorierung von Cyclopenten in Gegenwart von Alkoholen (1980)

Beger, J. ; Thielemann, C.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 809-815

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Three Component Reactions XI. Bromochlorination of Cyclopentene in the Presence of AlcoholsThe product composition of reaction mixtures after the addition of bromochlorine to cyclopentene in the presence of several alcohols was determined by GLC in dependence of the molar relations, the temperature and the order of addition. A comparison with the chlorination and bromination is given.The yields of three component products increase in the order bromination-bromochlorination-chlorination and decrease from primary to tertiary alcohols.

Additional Material: 5 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220515

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

97

Electronic Resource

Aldehyde, tert. Amine bzw. Acetale aus Amidacetalen und Grignardverbindungen (1980)

Walther, H. ; Haase, L. ; Gross, H. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 902-908

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Aldehydes, tert. Amines or Acetales from Amidacetales and Grignard-CompoundsAmidacetales 1 or -mercaptales 9 respectively react with Grignard-agents dependent on molar ratio by exchange of methoxy- or methylthio group via not isolable O,N- or S,N-acetales to the corresponding aldehydes 4 or the tert. amines 3. Starting from bicyclic amidacetales 6 aldehydes or bis-β-hydroxyethylamines 8 are formed. By quaternisation of the amidacetal-nitrogen followed by reaction with Grignard-agents the corresponding O,O-acetales are formed.

Additional Material: 4 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220607

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

98

Electronic Resource

Zur Berechnung der Temperaturabhängigkeit der kritischen Mizellbildungskonzentration endständiger Alkansulfonate (1980)

Sowada, Rudolf

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 945-948

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Concerning the Calculation of the Temperature Dependence of Critical Mizellization Concentration Values for Terminal Alkane SulphonatesTschernikov's equation for calculating cM-values of homologous sodium alkane-1-sulphonates at different temperatures has been modified. By means of this modified equation A values of Stauff/Klevens' equation have been calculated. These A values show a linear dependence on temperature.In a modified form presented in this paper Stauff/Klevens' equation can now be used for calculating cM-values of homologous sodium alkane-1-sulphonates at different temperatures.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220611

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

99

Electronic Resource

Interpretation von Moleküldiagrammen freier π-Radikalkationen - Naphthalen, Butadien, Styren, 1-Methylstyren, 1,1′Diphenylethylen (1980)

Helmstreit, W. ; Hanschmann, G.

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 981-986

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Interpretation of the MO-diagrams of Free π-Radical Cations - Naphthalene, Butadiene, Styrene, 1-Methyl-styrene, 1,1′-DiphenylethyleneThe reactive and spectroscopic behaviour of the radical cations of the title compounds is discussed on the basis of general structural principles by means of molecular diagrams calculated with the PPP-LHP-SCF-MO-CI-method. The greater reactivity of the monomer radicals compared with the dimers is due to the character of polymethene-like compounds, whereas the lower reactivity of the dimer radicals cations can be ascribed to the more aromatic state of these species. The experimentally determined optical absorption maxima of the radical cations can be interpreted by the same classification.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220615

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

100

Electronic Resource

Diels-Alder-Reaktionen. VIII. Kinetische Untersuchungen zur Bildung und zur Pyrolyse von Tetracyclo[6.2.1.13.6.02.7]dodec-4-en (1980)

Moll, K. K. ; Ramhold, K. ; Zimmermann, G. ; [et al.]

New York, NY : Wiley-Blackwell

Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 1048-1052

add to mindlist on the mindlist

Details

ISSN: 0021-8383

Keywords: Chemistry ; Organic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Diels-Alder-Reactions. VIII. Kinetic Investigations of the Formation and the Pyrolysis of Tetracyclo [6.2.1.13.6.02.7]-dodec-4-enThe formation of tetracyclo[6.2.1.13.6.02.7]dodec-4-ene by codimerisation of cyclopentadiene with bicyclo[2.2.1]hept-2-ene between 60 and 140°C in the liquid phase and the inverse reaction by gas phase pyrolysis between 240 and 300°C were studied kinetically. The activation parameters were determined.

Additional Material: 2 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prac.19803220623

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext