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
  • 1
    Electronic Resource
    Electronic Resource
    Zur Reaktion von Cyanodithioformiaten mit primären Aminen (1981)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 323 (1981), S. 41-48 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Cyanodithioformates with Primary AminesN-Alkyldithiooxamides 3 and N,N -dialkyldithiooxamides 4 were synthesized in good yields by reaction of cyanodithioformates 1 with primary aliphatic amines. N-Alkylcyanothioformamides 2, intermediates in these reactions were obtained in very low yields only. The reaction of 1 and diaminoethane or 1.3-diaminopropane afforded imidazolidine-2-thione 5a respectively perhydropyrimidine-2-thione 5b. The reaction of 1 with 1-chloro-2-aminoethane did gave 2-thiocarbamoylthiazoline 7.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19813230107
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Zur Chemie der 3-Aroylimino-3H-1,2-dithiole (1980)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 322 (1980), S. 769-784 
    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
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Silanole. IV. Hydrolyse des Di(t-butoxy)-dichlor-silans (1961)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 311 (1961), S. 53-61 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The hydrolysis of di(t-butoxy)-dichloro-silane, (t-C4H9O)2SiCl2, is characterized by a strong steric hindrance and enclosure of the reactive groups by the large (t-butoxy)-groups. The hydrolysis products are hydrophobic and relatively inert, especially the (t-butoxy)-silanediols. More reactive are the (t-butoxy)-chloro-siloxanols and thus they are the most important carriers of the hydrolysis reaction. A chloro-siloxanol could be prepared for the first time.By steric reasons, the thermal condensation yields a six-membered ring, [(t-C4H9O)2SiO]3, though otherwise tetracyclosiloxanes are preferably formed.
    Notes: Das Hydrolyseverhalten des Di(t-butoxy)-dichlor-silans [t-C4H9O]2SiCl2 ist gekennzeichnet durch starke sterische Hinderung und Umhüllung der reaktiven Gruppen durch die raumbeanspruchenden (t-Butoxy)-Gruppen. Die Hydrolyseprodukte sind hydrophob und relativ reaktionsträge. Besonders die (t-Butoxy)-siloxandiole neigen wenig zu weiterer Kondensation. Reaktionsfähiger und damit die wesentlichen Träger der Hydrolysereaktion sind die (t-Butoxy)-chlor-siloxanole, von denen erstmalig ein Vertreter dargestellt werden konnte.Die Hitzekondensation führt aus sterischen Gründen zur Bildung des 6gliedrigen Ringes [(t-C4H9O)2SiO]3, während sonst Tetracyclosiloxan-Ringe bevorzugt werden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19613110107
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Silicium-Komplexe IVVorbericht: Z. anorg. allg. Chem. 363, 321 (1968).. Über die Bildung von Chelat-Komplexen des Siliciums mit Benzoylessigsäureäthylester (1969)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 371 (1969), S. 81-87 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By reactions of SiCl4, RSiCl3, RSiCl2(OCOCH3), R2SiCl2 and R3SiCl, [R—CH3 and C2H5], with C6H5CO—CH2—CO—OC2H5 the substances listed in ‘Inhaltsübersicht’ have been prepared and investigated by means of UV and IR spectroscopy concerning the problem of chelate complexes with hexacovalent Si atoms.
    Notes: Durch Umsetzungen von SiCl4, RSiCl3, RSiCl2(OCOCH3), R2SiCl2 und R3SiCl[R = CH3, C2H5] mit Benzoylessigsäureäthylester wurden Produkte folgender Zusammensetzung dargestellt: Die dargestellten Verbindungen wurden mittels UV- und IR-Absorptionsspektren daraufhin untersucht, ob Chelatkomplexe mit hexakovalentem Silicium vorliegen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19693710110
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Cyanohydrazonothioformiate - Darstellung und ReaktionenProfessor Günther Schott zum 60. Geburtstage am 29. April 1981 gewidmet (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 476 (1981), S. 33-40 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyanohydrazonothioformate  -  Preparation and ReactionsSodiumcyanohydrazonothioformate-monohydrate NaSC(CN)NNH2 · H2O is obtained by reaction of sodiumcyanodithioformate with hydrazine. The new compound forms S-organosubstituted derivatives. Reaction with bivalent metal cations lead to coordination compounds MII(SC(CN)NNH2)2 · 2H2O, which subjected the facile reaction with carbonyl compounds yield alkylidenehydrazonocyanothioformates MII(SC(CN)NNCRR1)2. The results of i.r. spectroscopic and thermogravimetric measurements are reported.
    Notes: Natriumcyanohydrazonothioformiat-Monohydrat NaSC(CN)NNH2 · H2O ist durch Reaktion von Natriumcyanodithioformiat mit Hydrazin zugänglich. Die Verbindung bildet S-organosubstituierte Derivate. Mit zweiwertigen Metallionen lassen sich Koordinationsverbindungen MII(SC(CN)NNH2)2 · 2 H2O darstellen, die sich mit Carbonylverbindungen leicht zu Alkyliden-hydrazonocyanothioformiaten MII(SC(CN)NNCRR1)2 umsetzen. Die Ergebnisse IR-spektroskopischer und thermogravimetrischer Untersuchungen werden mitgeteilt.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814760505
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Über Sulfatoborate (1962)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 314 (1962), S. 104-112 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By reaction of sulphates with boric acid and sulphur trioxide bis(sulphato)borates: MeI[B(SO4)2]2, MeII[B2O(SO4)2]2 and tris(sulphato)diborates: MeII[B2O(SO4)3], could be prepared. These substances are very hygroscopic and sensitive to hydrolysis. Probably they are ionic compounds with high-polymeric anions.
    Notes: Durch Umsetzung von Sulfaten mit Borsäure und Schwefeltrioxid wurden Bis-(sulfato)borate: MeI[B(SO4)2]2 und Tris(sulfato)diborate: MeII[B2O(SO4)3] gewonnen. Diese Substanzen sind stark hygroskopisch und äußerst hydrolyseempfindlich. Vermutlich handelt es sich um Salze mit hochpolymerem Anion.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19623140113
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Silanole. VIII. Beitrag zur Kenntnis der SiCl4-Hydrolyse in Diäthyläther (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 362 (1968), S. 80-86 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: In the reaction of SiCl4 with water or salt hydrates in diethyl ether an ether cleavage goes on parallel to the hydrolysis. Probably ether cleavage can be discussed as the reversal of the proton-catalysed equilibrium of ether formation from alcohol. In addition to various chlorosiloxanes, ethoxytrichlorosilane and higher-boiling ethoxychlorosiloxanes were obtained. Reports on the formation of trichlorosilanol and pentachlorodisiloxanol by these reactions could not be confirmed.
    Notes: Bei der Hydrolyse von SiCl4 in Diäthyläther mit Wasser oder Salzhydraten tritt Ätherspaltung auf, die wahrscheinlich im Sinne einer Umkehrung des protonenkatalysierten Gleichgewichts der Ätherbildung aus Alkohol gedeutet werden kann. Neben den verschiedenen Chlorsiloxanen ließen sich in den Hydrolysaten Äthoxytrichlorsilan und nicht näher definierte höhersiedende Äthoxychlorsiloxane nachweisen. Mitteilungen über die Bildung von Trichlorsilanol und Pentachlordisiloxanol bei diesen Reaktionen konnten nicht bestätigt werden.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19683620113
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Aminocarbonylthioformiate - Darstellung und Reaktionen (1981)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 480 (1981), S. 186-192 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aminocarbonylthioformates  -  Preparation and ReactivitySodium aminocarbonylthioformate NaSCOCONH2 (II) is obtained by reaction of sodium cyanodithioformate with acetone in presence of a secondary amine and water. II permits to produce the acid HSCOCONH2 · H2O (IX) and salts MII(SCOCONH2)2 · 2H2O. In basic aqueous solutions hydrolysis of II to oxaminate and oxalate, respectively, takes place, an excess of aqueous ammonia leads to amidino formic acid. In organic solvents the reaction of IX with N-bases yields stable ammonium salts. The results of i.r. spectroscopic and thermogravimetric measurements are discussed.
    Notes: Natriumaminocarbonylthioformiat NaSCOCONH2 (II) entsteht bei der Umsetzung von Natriumcyanodithioformiat mit Aceton in Gegenwart von sekundärem Amin und Wasser. Aus II sind die Säure HSCOCONH2 · H2O (IX) und Salze zweiwertiger Kationen MII(SCOCONH2)2 · 2H2O zugänglich. In basischen wäßrigen Lösungen reagiert II unter Bildung von Oxaminat bzw. Oxalat, mit überschüssigem wäßrigen Ammoniak setzt es sich zu Amidinoameisensäure um. In organischen Lösungsmitteln bildet die Säure IX mit N-Basen stabile Ammoniumsalze. Die Ergebnisse IR-spektroskopischer und thermogravimetrischer Untersuchungen werden diskutiert.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19814800924
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Koordinationsverbindungen des Siliciums mit C3-substituierten Acetylacetonen (1971)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 386 (1971), S. 59-66 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hexacoordinated silicon-complexes with C3-substituted acetylacetones have been prepared. The reaction rates of hydrolysis of these compounds have been compared with UV- and IR-spectra and thermogravimetric data.There are no significant correlations between reaction rate constants and spectroscopic data, but hydrolytic and thermal stability have a similar dependence from the substituents.
    Notes: Mit C3-substituierten Acetylacetonen wurden einige hexakoordinierte Silicium-Komplexe [Si(X-acac)3]+HCl2- (X = H, CH2—C6H5, C3H5, n-C3H7, CH3, C2H5, i-C3H7, OCOCH3, Cl) dargestellt. Die Reaktionsgeschwindigkeiten der hydrolytischen Zersetzung dieser Verbindungen, die UV- und IR-Spektren sowie thermogravimetrische Meßergebnisse werden mitgeteilt.Es besteht kein eindeutiger Zusammenhang zwischen dem Gang der Hydrolysegeschwindigkeit und den spektroskopischen Daten. Dagegen weisen hydrolytische und thermische Stabilität eine ähnliche Substituentenabhängigkeit auf.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19713860107
    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...