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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 76 (1981), S. 1-9 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Einige Beispiele für die Anwendung der Derivativspektrophotometrie höherer Ordnung in der Mikroanalyse wurden angegeben. Im besonderen wurden die Erhöhung der Empfindlichkeit der Zn- und Cd-Dithizonat-Bestimmung, die quantitative Bestimmung von Arenen, Anilin, Phenol, die Erfassung von Saccharin in Limonaden und sowohl die Charakterisierung als auch die quantitative Bestimmung von Farbstoffen in Lösung oder adsorbiert an einer dünnen Schicht Aluminiumoxid beschrieben. Es werden nur einige Mikrogramm bis Nanogramm Substanz für die Untersuchungen benötigt.
    Notes: Summary Examples are given of the application of higher-order derivative spectrophotometry to microanalytical problems, including the increase in sensitivity for estimation of Zn and Cd dithizonates and the quantitative detection of arenes, aniline and phenols. We also describe the estimation of saccharin in soft drinks, and the characterization and estimation of dyes in solution and after absorption on a thin layer of alumina. Only ng-μg amounts of substance are needed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and X-Ray Structure Analysis of a Double-Donor-Acceptor-substituted Quinonemethide with Central 1,6-Methano[10]annulene SkeletonThe synthesis of 3-5 as well as the spectroscopic properties of 3-5 are described; an X-ray structure analysis of 5 is reported.
    Notes: Es wird über die Darstellung der Verbindungen 3-5 sowie deren spektroskopische Eigenschaften berichtet; 5 wurde röntgenstrukturanalytisch untersucht.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Adducts of Chalcogens with Bis(di-tert-butylphosphino)sulfur Diimide - Solid State Structures of Bis[di-tert-butyl(thiophosphinyl)]- and Bis[di-tert-butyl(selenophosphinyl)]sulfur DiimideBis(di-tert-butylphosphino)sulfur diimide, S(N — PtBu2)2 (1), adds sulfur and selenium at both phosphorus atoms to give the new chalcophosphinyl-substituted sulfur diimides S[N — P(Y)tBu2]2 (Y = S (2a), Se (2b)). According to the single-crystal X-ray structure analyses, 2a and 2b are present in the unsymmetrical Z/E-configuration in the solid state. However, the 31P NMR spectra give no indication of non-equivalence of the two phosphorus substituents in solution.
    Notes: Bis(di-tert-butylphosphino)schwefeldiimid, S(N — PtBu2)2 (1), addiert Schwefel und Selen an beide Phosphoratome unter Bildung der neuen Chalkophosphinyl-substituierten Schwefeldiimide S[N — P(Y)tBu2]2 (Y = S (2a), Se (2b)). Nach den Einkristall-Röntgenstrukturanalysen liegen 2a und 2b im Festkörper in der unsymmetrischen Z/E-Konfiguration vor. Dagegen geben die 31P-NMR-Spektren keinen Hinweis auf eine Nichtäquivalenz der beiden Phosphorsubstituenten in Lösung.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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