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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 101 (1968), S. 3058-3061 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Synthese von Tris-dialkylamino-methanen aus Bis-dialkylamino-alkoxy-methanen und Dialkylaminen sowie die von Bis-dimethylamino-alkylanilino-methanen aus Bisdimethylamino-tert.-butyloxy-methan (tert.-Butylaminalester) und N-Alkyl-anilinen beschrieben.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 3395-3405 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Orientation of the Addition of Diazopropene and Diazomethane to Acetylenic CompoundsThe addition of diazomethane (1a) and diazopropene (1b) to monosubstituted (2a-g) and disubstituted (2h-k) acetylenic compounds is described. The validity of the orientation rule formulated by v. Auwers and Ungemach for these additions and the dependence of the orientation on substituents of the triple bond are examined. In contrast to 1a, 1b reacts only with carbonyl conjugated triple bonds and only in one of the two possible orientations. The structure of the isolated pyrazole derivatives 3-14 is confirmed by n.m.r. spectroscopy and the structure of 15-18 by chemical means.
    Notes: Diazomethan (1a) und Vinyldiazomethan (1b) werden an einseitig (2a-g) und doppelseitig (2h-k) substituierte Acetylenderivate addiert. Es wird die Gültigkeit der Orientierungsregel von v. Auwers und Ungemach für diese Additionen überprüft und die Abhängigkeit der Orientierung der Additionen von den Substituenten der Dreifachbindung untersucht. 1b reagiert im Gegensatz zu 1a nur mit carbonylkonjugierten Dreifachbindungen und dabei nur jeweils in eine der beiden möglichen Additionsrichtungen. Der Strukturbeweis für die erhaltenen Pyrazolderivate 3-14 erfolgte NMR-spektroskopisch, für 15-18 mit Hilfe chemischer Methoden.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polyvinylpyrrolidone forms complexes with hydrogen halides (HX; X = Cl, Br, I) and halogen molecules (Y2; Y = Br, I). For these compounds a structure is proposed in which the proton is coordinated to the carbonyl groups of two pyrrolidone rings by strong hydrogen bonds. The \documentclass{article}\pagestyle{empty}\begin{document}$ {\rm XY}_{\rm 2}^ \ominus $\end{document}-anion is attached ionically to this complex cation. The structure of these complexes could be elucidated by comparative examination of the Lig2 · HX · Y2-complexes of model compounds such as N,N-dimethylacetamide, N-alkyl-2-pyrrolidones (2a - d), and 1,3-bis(2-oxo-1-pyrrolidinyl)butane (3) and the analogous polyvinylpyrrolidone complexes. The structure of the (N-methyl-pyrrolidone)2 · HI3-complex was examined by X-ray structure analysis. In a similar way the potassium salts (Lig2 · KX · Y2) of the complex acids could be prepared from the ligands, potassium halides, and halogen molecules. Unlike the proton, the potassium cation appears to be only weakly attached to the carbonyl groups of the ligands.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 82 (1970), S. 558-558 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 5
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Homopolymers of 3(resp. 5)-vinyl-pyrazolderivates were obtained by radical solution polymerisation and their properties were examined. Resins of limited swelling were prepared by copolymerisation of 2.5 mole-% bis-[3(resp. 5)-vinyl-5(resp. 3)-pyrazolyl]-ketone with 3(resp. 5)-vinyl-5(resp. 3)-pyrazolecarboxylic acid ethyl ester (I) or 3(resp. 5)-vinyl-4.5(resp. 3)-pyrazoledicarboxylic acid dimethyl ester (II). By saponification they were converted to poly-vinyl-pyrazole-carboxylic acid resins (resin A1 and resin A2). The latter are chelating resins of high capacity. The possibility of binding the metal ions Cu2⊕, Ni2⊕, Zn2⊕, and Mg2⊕ and the sorption rate was studied in the pH range 1-5.5.
    Notes: Durch radikalische Lösungspolymerisation wurden Homopolymere von 3(bzw. 5)-Vinylpyrazol-derivaten erhalten und deren Eigenschaften untersucht. Durch Copolymerisation von 2,5 Mol-% Bis-[3(bzw. 5)-vinyl-5(bzw. 3)-pyrazolyl]-keton mit 3(bzw. 5)-Vinyl-5(bzw. 3)-pyrazol-carbonsäureäthylester (I) bzw. 3(bzw. 5)-Vinyl-4.5(bzw.3)-pyrazol-dicarbonsäuredimethylester (II) wurden Harze dargestellt, die nur begrenzt quellbar sind und die durch Verseifung in Poly-[vinyl-pyrazol-carbonsäure]-harze (Harz A1 und Harz A2) überführt wurden. Diese Harze stellen hochkapazitive Chelatharze dar. Es wurde das Metallionenbindungsvermögen für Cu2⊕, Ni2⊕, Zn2⊕ und Mg2⊕ und die Aufnahmegeschwindigkeit in Abhängigkeit vom pH-Wert im Bereich von pH 1 bis pH 5,5 untersucht.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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