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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: Derivatives of Dithiocarbazic Acid as Ligands in Carbonyl Complexes of Manganese(I) and Rhenium(I).The Structures of Tricarbonylbis(S-methyldithiocarbazato)manganese(I) Bromide and Bis-μ-(N-isopropylidene-S-methyldithiocarbazato)-bis(tricarbonylmanganese(I))Ionic carbonyl complexes 3a, b, 4a, b are formed by the reaction of M(CO)5Br, M=Mn, Re, with S-methyl dithiocarbazate (2) in acid or neutral solutions. In alcaline solutions neutral complexes 5, 6 with the deprotonated ligand [NH2NCS2CH3]- or with its related Schiffbase anion [(CH3)2CNNCS2CH3]- (7) have been obtained. The structures of the two title compounds 3a and 7 have been determined by single crystal X-ray methods. The [Mn(CO)3 (NH2NHCS2CH3)2]+ ion contains one ligand coordinated as a chelate through N and S, in addition to a monodentate ligand, acting as N donor. The centrosymmetric dimer [Mn(CO)3 ((CH3)2CNNCS2CH3)]2 (7) contains a four-membered Mn2S2 core.
    Notes: Bei der Reaktion von Dithiocarbazinsäure-S-methylester (2) mit M(CO)5Br, M=Mn, Re, bilden sich in saurer oder neutraler Lösung ionische Carbonylkomplexe 3a, b, 4a, b. In alkalischem Medium entstehen Komplexe 5, 6 des deprotonierten Liganden [NH2NCS2CH3]-, oder nach Reaktion des Liganden mit Aceton der Komplex 7 der daraus abgeleiteten Schiffschen Base. Die Strukturen der Titelverbindungen 3a und 7 wurden röntgenographisch bestimmt. Das [Mn(CO)3(NH2NHCS2CH3)2]+-Ion enthält gleichzeitig einen chelatartig über N und S sowie einen monodentat über N gebundenen neutralen Liganden. [Mn(CO)3((CH3)2CNNCS2CH3)]2 (7) ist dimer und enthält einen Mn2S2-Vierring.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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