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  • Springer  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 16 (1979), S. 103-118 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Les transformations thermiques de phosphines, sels de phosphonium et esters phosphoriques de structures diverses ont été étudiées par ATD ainsi que quelques réactions de divers composés organiques du phosphore. Les données ATD ont été rapportées aux réactions-types suivantes: I. ATD de composés individuels: 1. A→B; 2. A→B+ C II. ATD de mélanges réactionnels: 1. A+B→C; 2. A+B→ C+D Des exemples d'utilisation de l'ATD sont donnés dans le cas de réactions d'isomérisation, de décomposition, de pénétration, d'addition, d'échange, etc. La méthode relativement simple d'ATD permet d'obtenir les conditions optimales des réactions et d'établir quelques règles dans l'avancement des réactions.
    Abstract: Zusammenfassung Mit Hilfe der DTA wurden die thermischen Umwandlungen von Phosphinen, Phosphoniumsalzen und Phosphorestern von verschiedenen Strukturen sowie gewisse Reaktionen von einigen phosphororganischen Verbindungen untersucht. Die DTA-Daten wurden nach Reaktionstypen behandelt: I. DTA von individuellen Verbindungen: 1. A→B; 2. A→B+ C II. DTA von Reaktionsgemischen: 1. A+ B→ C; 2. A+ B→ C+ D Beispiele der Anwendung von DTA zur Untersuchung der Isomerisations-, Zerfalls-, Eindrings-, Anlagerungs-, Austausch- und anderen Reaktionen wurden vorgeführt. Die verhÄltnismÄ\ig einfache DTA-Methode lÄ\t die optimalen Reaktionsbedingungen finden und einige GesetzmÄ\igkeiten des Reaktionsablaufs feststellen.
    Notes: Abstract The thermal transitions of phosphines, phosphonium salts and esters of phosphorus acids, as well as some reactions of different phosphorus compounds, were studied by DTA. I. DTA data have been considered for various types of reactions: 1. A→B; 2. A→B+C II. DTA of reactive mixtures: 1. A+B→C; 2. A+B→C+D Examples of the use of DTA were shown for studying the processes of isomerization, decomposition, and different regroup reactions of addition, combination, exchange and disintegration. The simple method of DTA allows one to find the optimum conditions of the reactions and to establish their reaction paths.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-8388
    Keywords: Lupinus angustifolius ; Lupinus luteus ; polysaccharides ; structure ; hydrolysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Polysaccharides ofLupinus angustifolius (Bryansk 123 and Krystall varieties) andLupinus luteus (SG-91 variety) are extracted and hydrolyzed. Their chemical composition and structural features are studied. Optimal conditions for extraction, hydrolysis, and purification of the lupine polysaccharides are found. Structural features of the isolated pectins are determined based on13C NMR and IR spectroscopy.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The formation enthalpies and dipole moments of the complexes of trifluoroacetic acid (TFAA) with tributyl-, tricyclohexyl-, and triphenylphosphine were measured. 2. The smaller formation enthalpy of the complex of TFAA with (C6H5)3P when compared with aliphatic phosphines is probably not related to the steric factor, but rather to the energy consumed in breaking the pπ-conjugation in triphenylphosphine during complexing.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 33 (1984), S. 669-670 
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions Ammonium phosphonium salts are formed when tertiary phosphines are reacted with benzalaniline in the presence of dry HCl.
    Type of Medium: Electronic Resource
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