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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 2789-2797 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclopentadienyl-substituted Germylenes and Stannylenes as Complex LigandsTransition metal complexes of chloro(pentamethylcyclopentadienyl)germylene and -stannylene with pentacarbonylchromium and -tungsten bound to the 4B-element (3a, b, 5a, b) are available by alkylation of the ylide complexes Cl2(THF)El→M(CO)5 (El=Ge, Sn; M=Cr, W, 1a, b, 4a, b). X-Ray structure studies on the germylene complex Me5C5(Cl)-Ge→ W(CO)5 (3b) show that involving the lone-pair of the 4B-element in a metal-metal bond changes the distorted h5-Me5C5 coordination of the uncomplexed germylene to a highly symmetrical h2-structure.
    Notes: Übergangsmetallkomplexe des Chlor(pentamethylcyclopentadienyl)germylens und -stannylens mit am 4B-Element gebundener Pentacarbonylchrom- bzw. -wolframeinheit (3a, b, 5a, b) werden durch Alkylierung der Ylidkomplexe Cl2(THF)El→M(CO)5 (El=Ge,Sn; M=Cr, W, 1a, b, 4a, b) erhalten. Röntgenographische Untersuchungen am Germylenkomplex Me5C5(Cl)Ge→W(CO)5 (3b) zeigen, daß sich die Inanspruchnahme des “lone-pair” am 4B-Element in einem Wechsel der verzerrten h5-Me5C5-Koordination im freien Germylen zu einer hochsymmetrischen h2-Koordination äußert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 3357-3365 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses and Reactions of New Germylene Complexes of Chromium and TungstenPentacarbonyl[dichloro(tetrahydrofuran)germylene]chromium(0) (1) and -tungsten(0) (2) react with (diphenylamino)trimethylstannane to give the NR2-substituted germylene complexes 3 and 4, respectively. Complexes with Ge(OR)2 ligands are shown to be very unstable. Reaction of [bis(mesitylthio)germylene]pentacarbonylchromium(0) (5) with boron trichloride, bromide, and iodide leads to the dihalogenogermylene complexes 7, 8, and 9. Properties and some reactions of the prepared compounds are described. The π-acceptor capability of the germylenes is discussed on the basis of vCO-data.
    Notes: Durch Umsetzung von Pentacarbonyl[dichlor(tetrahydrofuran)germylen]chrom(0) (1) und -wolfram(0) (2) mit (Diphenylamino)trimethylstannan werden die NR2-substituierten Germylen-Komplexe 3 und 4 hergestellt. Komplexe mit Ge(OR)2-Liganden erweisen sich als sehr instabil. Bei der Reaktion von [Bis(mesitylthio)germylen]pentacarbonylchrom(0) (5) mit Bortrichlorid, -bromid und -iodid entstehen die Dihalogengermylen-Komplexe 7, 8 und 9. Eigenschaften und einige Reaktionen der dargestellten Verbindungen werden beschrieben. Die π-Akzeptorfähigkeit der Germylene wird anhand der vCO-Daten diskutiert.
    Additional Material: 3 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 3366-3368 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of μ-(Dihalogenogermylene)-bis(pentacarbonyltungsten) ComplexesThe reaction of [bis(mesitylthio)germylene]pentacarbonyltungsten(0) (1) with boron trichloride and tribromide leads to the μ-(dihalogenogermylene)-bis(pentacarbonyltungsten) complexes 2 and 3. A reaction mechanism is discussed.
    Type of Medium: Electronic Resource
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