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  • Chemistry  (3)
  • 1975-1979  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 425 (1976), S. 249-256 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Conformation and Configuration of Some DichalcogenastannolanesThe 1H-n.m.r. patterns of 4-substituted 1.3-dioxa-(1.3-dithia-)-2-stannacyclopentanes and of 1.3-oxathia-2-stannacyclopentanes are analysed. The spectral parameters are elucidated by simulation accompanied by least squares fitting procedures. The coupling constants are related to the conformation of the heterocycles and to the configuration at tin.
    Notes: Die Protonenspektren von 4-substituierten 1,3-Dioxa-(1,3-Dithia-)2-stannacyclopentanen und von 1,3-Oxathia-2-stannacyclopentanen werden analysiert und die Parameter durch Simulationsrechnung gewonnen. Die Kopplungskonstanten werden in Beziehung zur Konformation der Heterocyclen zur und Konfiguration am Zinnatom gebracht.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 432 (1977), S. 269-274 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tin-Chalcogen Heterocycles. III. Preparation of 2,4,5-Hexamethyl-1,3-diselena-2,4,5-tristannolane and its Tellurium AnalogonTwo tin-rich heterocycles are prepared. The constitution as five-membered tin chalcogen cycles is confirmed by elemental analysis, x-ray fluorescence analysis, mass and p.m.r. spectra.
    Notes: Die Darstellung zweier zinnreicher Chalkogenheterocyclen wird beschrieben. Untersuchungen zur Konstitution erfolgen mittels Elementaranalyse, Röntgenfluoreszenzanalyse, Massen- und Protonenresonanzspektren. Die Konstitution der Verbindungen läßt sich als Zinn-Chalkogen-Fünfring beschreiben.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 412 (1975), S. 71-76 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Estimation of the Conformational Barrier in 1.3.2-Dithiastannolanes by Tin SatellitesThe method of using the 117/119tin satellites in the 1H NMR spectrum of 2.2-disubstituted 1.3.2-dithiastannolanes is proposed to overcome the difficulties in the conformational analysis arising from rapid interconversions. The enthalpy of the transition state is given.
    Notes: An Hand der 117/119Zinn-Satelliten im 1H-Kernresonazspektrum von 2,2-disubstituierten 1,3,2-Dithiastannolanen wird versucht, die Schwierigkeiten in der Konformationsanalyse zu überwinden, die mit sehr schneller Ringinversion verbunden sind. Die Enthalpie des Übergangszustandes wird berechnet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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