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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 600 (1991), S. 89-93 
    ISSN: 0044-2313
    Keywords: 77Se.n.m.r. ; coordination compounds ; unsaturated selenium ligands ; relaxation times T1 ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 77Se-NMR-Investigations of Bis-Chelates with Heterocyclic 1,2-Dichalcogenolates77Se-n.m.r. chemical shifts of metal(II)- and metal(III)-bis-chelates of 1,3-diselenole-2-selone-4,5-diselenolate (dsis), 1,3-dithiole-2-selone-4,5-diselenolate (dsise), 1,3-dithiole-2-selone-4,5-dithiolate (dmise) and 1,3-dithiole-2-thione-4,5-diselenolate (dsit) and relaxation times T1 (spain-lattice relaxation time) of the Se nucleus of (Bu4N)2[Zn(dsit)2], (Bu4N)2[Zn(dmise)2] and (Bu4N)2[Zn(dsise)2] are reported. Comparisons are made between 77Se-n.m.r. chemical shifts and the nature of coordination centre and coordination geometry.
    Notes: 77Se-NMR-Untersuchungen77Se-NMR-chemische Verschiebungen von Metall(II)- und Metall(III)-Bis-Chelaten des 1,3-Diselenol-2-selon-4,5-diselenolats (dsis), 1,3-Dithiol-2-selon-4,5-diselenolats (dsise), 1,3-Dithiol-2-selon-4,5-dithiolats (dmise) und 1,3-Dithiol-2-thion-4,5-diselenolats (dsit) sowie Spin-Gitter Relaxationszeiten T1 der Se-Atome in den Chelaten (Bu4N)2[Zn(dsit)2], (Bu4N)2[Zn(dmise)2] und (Bu4N)2[Zn(dsise)2] werden mitgeteilt und Zusammenhänge zwischen der Lage der 77Se-Resonanzsignale und der Art des Koordinationszentrums, der Oxidationszahl des Zentralions und der Koordinationsgeometrie diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1768-1776 
    ISSN: 0044-2313
    Keywords: Metallocene dichalcogenolene ; DNMR ; EPR, X-Ray ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Characterization of Metallocene Chelates of Heterocyclic 1,2-DithiolatesSynthesis and properties of metalocene dithiolene chelates Cp2ML with metal(IV) ions (M) of group IVA (Ti, Zr, Hf) and of vanadium with L = dmit (1,3-dithiole-2-thione-4,5-dithiolate), dmt (1,2-dithiole-3-thione-4,5-dithiolate), dmid (1,3-dithiole-2-one-4,5-dithiolate) and dmise (1,3-dithiole-2-selone-4,5-dithiolate) are described. The structures of these compounds were discussed using IR-, UV/VIS-, 1H-NMR-, 13C-NMR- and EPR data. The activation parameters of the chelate ring inversion of titanocene dithiolenes (Cp2TiL) and the x-ray structure of Cp2Ti(dmid) are given.
    Notes: Synthese und Eigenschaften neuer Metallocen-Dithiolen-Chelate Cp2ML der Metall(IV)-Ionen (M = Ti, Zr, Hf) sowie des Vanadiums mit L = dmit (1,3-Dithiol-2-thion-4,5-dithiolat), dmt (1,2-Dithiol-3-thion-4,5-dithiolat), dmid (1,3-Dithiol-2-on-4,5-dithiolat) und dmise (1,3-Dithiol-2-selon-4,5-dithiolat) werden beschrieben. Die Strukturen der Verbindungen werden anhand der IR-, UV/VIS-, Massen-, 1H-NMR-, 13C-NMR- bzw. EPR-Spektren diskutiert. Die durch dynamische Kernresonanzspektroskopie bestimmten Aktivierungs-parameter der Chelatringinversion der Titanocen-Dithiolene (Cp2TiL), sowie die Röntgenkristallstrukturanalyse von Cp2Ti(dmid) werden vorgestellt.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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