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  • 1
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Conformation and Bonding in Hydrazine Derivatives: The Crystal Structures of O-Methyl Thiocarbazate, S-Methyl Thiocarbazate, and Potassium ThiocarbazateThe thiocarbazic acid derivatives, O-methyl thiocarbazate (3), S-methyl thiocarbazate (4), and the thiocarbazate ion (2) are planar in the solid state. They crystallize in the form of hydrogen bridged dimers with the imino nitrogen as donor atom: 3 through NH … N, 4 through NH … O, and 2 through NH … S bonds. The hydrazide group in 3 displays E-conformation with respect to the C=S bond, in 4 with respect to the C=O bond. The ester groups are in the usual Z-conformation. In the solid state and in solution identical conformers are present as shown by spectroscopy.
    Notes: Die Thiocarbazinsäure-Derivate Thiocarbazinsäure-O-methylester (3), Thiocarbazinsäure-S-methylester (4) und das Thiocarbazinat-Ion (2) sind im festen Zustand planar. Sie bilden über das Wasserstoffatom der Iminogruppe zentrosymmetrische Dimere: 3 durch NH … N-, 4 durch NH … O- und 2 durch NH … S-Bindungen. Die Hydrazidgruppe besitzt E-Konformation in Bezug auf die C=S-Bindung von 3 bzw. auf die C=O-Bindung von 4. Die Estergruppen liegen in der üblichen Z-Konformation vor. Wie die Spektren zeigen, wird die Konformation des festen Zustands in Lösung beibehalten.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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