Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1975-1979  (16)
  • 1880-1889  (1)
Source
Material
Years
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    [(C6H5)4As]2[Ni(Se2C:C(CN)2)3], a new nickel(IV) chelate with an unsaturated 1,1-diselenolate ligand (1978)
    s.l. : American Chemical Society
    Inorganic chemistry 17 (1978), S. 1665-1667 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50184a057
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Individual sensitivity to lactose in lactose malabsorption (1977)
    Springer
    Digestive diseases and sciences 22 (1977), S. 177-181 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The clinical significance of lactose malabsorption and the individual sensitivity to lactose were investigated in 20 patients with verified lactose malabsorption. Thirteen patients were relieved of all symptoms while seven improved only on a lactose-free diet. The healthy patients did not experience any symptoms following provocation with lactose-free milk but following provocation with increasing amounts of lactose, the tendency to diarrhea and abdominal discomfort increased considerably. Three patients experienced discomfort after provocation with only 5 g lactose. On provocation with increasing amounts of lactose the seven patients who had not recovered also developed increased abdominal discomfort but none of them developed increased tendency to diarrhea. It is concluded that, in addition to lactose malabsorption, these patients must suffer from irritable colon with tendency to constipation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01072273
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Qualitätsnormen für Papier (1882)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 21 (1882), S. 598-598 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01356619
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    ESCA-Untersuchungen an Schwermetallchelaten substituierter N-Acyl-thio- und -selenoharnstoffe (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 432 (1977), S. 275-279 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: ESCA Investigations on Heavy Metal Chelates of Substituted N-acyl-thio- and -selenoureasN-acylthio- and -selenoureas give as 1,3-dichalcogenketones stable chelates of heavy metals, which are easy to synthesize. From the measurement of the chemical shifts of the N1s-, S2p- or Se3p- and metal nl-ESCA lines follows, that the bonding between the ligand and the central atom involves a σ-bond of oxygen and a donor bond of sulfur and selenium, with a decrease of the electronic density on S or Se, resp. The appearence of two N1s-signals can be explained by deprotonation, which is necessary for the formation of the complex.
    Notes: Die N-Acyl-thio- und -selenoharnstoffe bilden als 1,3-Dichalkogenketone relativ einfach zugängliche stabile Schwermetallchelate. Aus der Messung der chemischen Verschiebung der N 1s-, S 2p-, bzw. Se 3p- und Schwermetall nl-ESCA-Linien kann man den Schluß ziehen, daß die σ-Bindung des Zentralatoms über den Sauerstoff erfolgt. Die S- und Se-Atome gehen eine dative Bindung ein, wobei sich ihre Elektronendichte erniedrigt. Das Auftreten zweier N-Signale läßt sich durch die bei der Komplexbildung erforderliche Deprotonierung verstehen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774320139
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Chelatkomplexe mit N-Benzoylthiobenzamid, N-Benzoylbenzamid und N-Thiobenzoylbenzamidin (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 434 (1977), S. 16-28 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Chelates with N-Benzoylthiobenzamide, N-Benzoylbenzamide, and N-ThiobenzoylbenzamidineN-Benzoylthiobenzamide, 1, N-benzoylbenzamide, 2, and N-thiobenzoylbenzamidine-hydrochloride, 3, yield neutral complexes with numerous metal ions which have been characterized by i.r., electronic, and mass spectra as well as magnetic measurements. Compared with the CH2-analogous monothiodibenzoylmethane, H-MTDBM, the isosteric NH group in 1 preferentially influences the properties of the free ligand, e. g. tautomerism, configuration, acidity. ESCA data are used for the discussion of structures and bonding situations of the ligands and its metal complexes.
    Notes: N-Benzoylthiobenzamid, 1, N-Benzoylbenzamid, 2, und N-Thiobenzoyl-benzamidinhydrochlorid, 3, geben mit zahlreichen Metallionen Neutralkomplexe, die durch IR-, UV/VIS- und Massenspektren sowie magnetische Messungen charakterisiert werden. Verglichen mit dem CH2-analogen Monothiodibenzoylmethan, H-MTDBM, wirkt sich die isostere NH-Gruppe in 1 vorwiegend auf die Eigenschaften des freien Liganden (Tautomerie, Konfiguration, Azidität) aus. ESCA-Spektren werden zur Struktur- und Bindungsinterpretation bei Liganden und Metallkomplexen herangezogen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774340102
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Kristall- und MolekülStruktur von Bis(1,1-diäthyl-3-benzoyl-thioureato)palladium(II) (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 433 (1977), S. 237-241 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of Bis(1,1-diethyl-3-benzoyl-thioureato)palladium(II)The crystal structure of the complex bis(1,1-diethyl-3-benzoyl-thioureato)palladium(II) has been determined by X-ray crystal structure analysis. The substance crystallizes monoclinic, space group P21/n and cell dimensions a = 13.63, b = 19.88, c = 10.48 Å, β = 101.4° and 4 formula units in the unit cell. The structure was solved by conventional heavy atom methods and has been refined to a final R-value of 0.12. The S and O atoms are arranged in cis-position. Each Pd—S and Pd—O distances are different. The chelate rings are arranged in a plane.
    Notes: Die Kristallstruktur von Bis(1,1-diäthyl-3-benzoyl-thioureato)palladium(II) wurde durch Röntgeneinkristallstrukturanalyse bestimmt. Die Verbindung kristallisiert monoklin, Raumgruppe P21/n mit a = 13,63, b = 19,88, c = 10,48 Å, β = 101,4° Z = 4. Die Struktur wurde mit Hilfe der Schweratommethode gelöst und bis zu einem R-Wert von 0,12 verfeinert. Die S- und O-Ligatoratome sind in cis-Stellung angeordnet. Alle Pd—S- und Pd—O-Abstände sind unterschiedlich lang. Die Chelatringe sind eben gebaut.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774330127
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Nitrosyl-Metallkoordinationsverbindungen. I. Synthese und Eigenschaften von Eisen- und Kobaltkomplexen des Typs (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 299-303 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nitrosyl Metal Coordination Compounds. I. Synthesis and Properties of Iron and Cobalt Complexes of the Type Complex compounds of the type , with M = Fe, Co and thiodibenzoylmethanate (TDBM) and N-(morpholinothiocarbamoyl)-benzamidate (MTBA) have been synthesized. It has been established by means of molecular weigths measurements, IR and ESCA spectroscopy, and magnetic investigations that the iron complex 1 is a sulfur bridged dimeric molecule [Fe(TDBM)2NO]2, where each iron atom has the coordination number six. The cobalt complexes Co(TDBM)2NO, 2, and Co(MTBA)2NO, 3, are both monomeric with square pyramidal structures. The ESCA spectra are in each case in accordance with the formal oxidation number three of the central metal and a negative charged nitrosyl ligand.
    Notes: Komplexverbindungen des Typs , mit M = Fe, Co und Thiodibenzoylmethanat (TDBM) und N-(Morpholinothiocarbamoyl)-benzamidat (MTBA), wurden synthetisiert. Mittels Molmassebestimmung, IR- und ESCA-Spektroskopie sowie magnetochemischen Untersuchungen wurde nachgewiesen, daß der Eisenkomplex 1 als schwefelverbrückter Zweikern-komplex [Fe(TDBM)2NO]2 vorliegt, in dem jedes Eisenatom sechsfach koordiniert ist. Die Kobalt-komplexe Co(TDBM)2NO, 2, und Co(MTBA)2NO, 3, liegen monomer in quadratisch-pyramidaler Struktur vor. In allen Fällen weisen die ESCA-Spektren formal dreiwertige Zentralmetalle mit negativ geladenem Nitrosylliganden aus.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774370144
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Untersuchungen zur Alkylierung von Bis-Stilbendithiolato-Komplexen des Ni(II), Pd(II) und Pt(II)XXIV. Mitt. der Reihe „Dithiolenchelate“; XXIII. Mitt.: R. Kirmse, W. Dietzsch u. D. Rehorek, Z. Chem. 17, 33 (1977); XIX. Mitt.: R. Kirmse, W. Dietzsch u. E. Hoyer, Z. Chem. 14, 106 (1974). (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 440 (1978), S. 253-264 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigation on the Alkylation of Bis-Stilbendithiolato Complexes of NiII, PdII, and PtIIAlkylation reactions of co-ordinated ligands of the type of ethylene-bisthiol R2S2C22-proceed different depending on the substituents R.The neutral complexes isolated by a alkylation of the nickel bis-chelates (R = phenyl) according to Schrauzer and Rabinowitz and formulated by these authors as mixed ligand chelates of dithiolate and diether, were identified by us as complexes of the monoethers of the ligand.These nickel (II) complexes of the mono-ethers can not be alkylated further by alkyliodides.Oxidative coupling of two ligands yields disulfides which have been identified by mass spectroscopy thus indicating the original position of attack of the alkylating reagent. The formation of bis-monether complexes is reflected by the different charges on the S atoms of the model complex [Ni(CH3S2C2H2)(S2C2H2)]- obtained from EHT and CNDO calculations.Both possible stereo-isomers have been isolated of the bis-methylmonether complex of Pt(II). Trans-[M((CH3)(S2C2Ph2))2] (M = Ni(II), Pd(II)) form CH2Cl2 adducts.By treating the Ni-bis complexes of the monoalkylthioethers with iodine polyiodides are prepared.Binuclear Pd(II) complexes of composition [Pd2((R)(S2C2Ph2))2Cl2] could be prepared by metal exchange.
    Notes: Alkylierungsreaktionen an koordinierten vom Typ der Äthylen-1, 2-dithiolate R2S2′C22- verlaufen je nach Substituenten R verschieden.Die von Schrauzer und Rabinowitz durch Alkylierung der Nickel-bis-Chelate (R = Phenyl) erhaltenen neutralkomplexe, die sie als Gemischtligandenkomplexe formulieren, wurden von uns als Halbätherkomplexe identifiziert.Die Ni(II)-Halbätherkomplexe lassen sich mit Alkyljodiden nicht weiter alkylieren. Ihre Oxydation gibt durch die Verknüpfung zweier Liganden Disulfide, deren massenspektroskopische Identifizierung den ursprünglichen Alkylierungsort anzeigt. Die Bildung von Halbätherkomplexen wird sowohl durch EHT-als auch CNDO-Rechnungen anhand der unterschiedlichen Ladungsdichten an den S-Atomen des Modellkomplexes [Ni(CH3)(S2C2H2)]- gestützt. Vom Pt(II)-Methyl-halbätherkomplex wurden beide möglichen geometrischen Isomere isoliert.Trans-[M((CH3)(S2C2Ph2))2] (M = Ni(II), Pd(II), Pt(II)) bilden mit Methylenchlorid Addukte. Die Nickel (alkylhalbäther) komplexe liefern mit Jod in CHCl3 Polyjodidkomplexe. In einer Metallaustauschreaktion wurden Palladium-Zweikern-Komplexe [Pd2((R)(S2C2Ph2))2Cl2] dargestellt.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784400127
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    d-NMR-Untersuchungen der behinderten Rotation am N—C-(X)-Bindungsinkrement. VIII. Metallkomplexverbindungen von 1,1-Diäthyl-3-benzoylthio- und selenoharnstoffVII. Mitteilung: E. Kleinpeter, R. Widera u. M. Mühlstädt, Z. Chem., 17, 298 (1977). (1977)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 437 (1977), S. 282-288 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: d-N.M.R. Studies of Hindered Rotation on N—C(X) Bond Increment. VIII. Metal Complexes of 1,1-Diethyl-3-benzoylthio- and selenoureaThe coordination of 1,1-Diethyl-3-benzoylthiourea (debtu) and 1,1-Diethyl-3-benzoylselenourea (debsu) to a metal ion leads both with subgroup elements (Ni(II), Pd(II), Co(III), Zn(II), Cu(I)) and with main group elements (Pb(II), Tl(I)) to an increase of the free enthalpy of activation of the rotational process about the terminal N—C(X) bond. The order of the increase is with debtu: Ni(II) 〉 Pb(II) 〉 Pd(II) 〉 Co(III) 〉 Tl(I) and with debsu: Ni(II) 〉 Zn(II) 〉 Pd(II) 〉 Co(III). A decrease of the barrier of rotation was observed with Tl(debsu) only, which is dimeric in benzene solution. The characteristic IR-data of the ligand debtu and its Pd(II)-, Ni(II)-, and Tl(I)-complexes, and of the Cu(debtu)3Cl complex are given. The results are discussed.
    Notes: Die Koordination der Liganden 1,1-Diäthyl-3-benzoylthioharnstoff (debtu) und 1,1-Diäthyl-3-benzoylselenoharnstoff (debsu) an ein Metallatom führt sowohl bei Nebengruppenelementen (Ni(II), Pd(II), Co(III), Zn(II), Cu(I)) als auch bei Hauptgruppenelementen (Pb(II), Tl(I)) zur Erhöhung der freien Aktivierungsenthalpie ΔGc≠ der Rotation um die N—C(X)-Bindung. Die Reihenfolge der Erhöhung ist beim debtu: Ni(II) 〉 Pb(II) 〉 Pd(II) 〉 Co(III) 〉 Tl(I) und beim debsu: Ni(II) 〉 Zn(II) 〉 Pd(II) 〉 Co(III). Nur beim Tl(debsu) beobachtet man eine Erniedrigung der Rotationsbarriere. Es liegt in benzolischer Lösung dimer vor. Die charakteristischen IR-Daten des Liganden debtu und seiner Pd(II)-, Ni(II)- und Tl(I)-Komplexe, sowie die des Cu(debtu)3Cl werden angegeben. Die erhaltenen Ergebnisse werden diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19774370141
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Zur Bestimmung der Komplexstabilität aus massenspektrometrischen DatenProfessor Kurt Issleib zum 60. Geburtstage gewidmet (1979)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 458 (1979), S. 33-36 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Evaluation of Complex Stability from Mass Spectrometric DataMass spectrometric data and potentiometric stability constants (75% v/v dioxane/water) of Ni(II) and Cu(II) 1:2 chelates of several N-Benzoyl(thio)benzamides and N-Benzoyl(thio, seleno)ureas are compared. It turns out, that the % total ion stream (% TIS) correlates fairly well in a logarithmical plot against the cumulative stability constant of the chelates.
    Notes: Massenspektrometrisch und potentiometrisch (75 Vol-% Dioxan/Wasser) ermittelte Stabilitätsdaten für eine Reihe von Ni(II)- und Cu(II)-1:2-Chelaten von N-Benzoyl(thio)benzamid und N-Benzoyl(thio, seleno)harnstoffen werden verglichen. Es stellt sich heraus, daß sich für eine Korrelation mit den kumulativen Stabilitätskonstanten die sog. Summenprozente des Molekülionenpeaks eignen (logarithmische Auftragung).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19794580105
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...