Metal π Complexes of Benzene Derivatives. Germanium in the Periphery of Bis(benzene)vanadium and Bis(benzene)chromium. Synthesis and Structure of New Heterametallocyclophanes,1
| Autor: | Bernhard Metz, Eckhardt Schmidt, Rolf Gondrum, Olaf Burghaus, Christoph Elschenbroich, Sigrid Wocadlo, Werner Massa |
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| Rok vydání: | 1997 |
| Předmět: |
Organic Chemistry
Inorganic chemistry Vanadium chemistry.chemical_element Medicinal chemistry law.invention Inorganic Chemistry Metal chemistry.chemical_compound Chromium chemistry law visual_art visual_art.visual_art_medium Physical and Theoretical Chemistry Digermane Cyclic voltammetry Benzene Electron paramagnetic resonance Bis(benzene)chromium |
| Zdroj: | Organometallics. 16:4589-4596 |
| ISSN: | 1520-6041 0276-7333 |
| Popis: | Mono- and digerma[n]metallocyclophanes (n = 1, 2) [(η6,η6‘-dimethyldiphenylgermane)M] (M = Cr, 17; V, 18•), [(η6,η6‘-tetraphenylgermane)M] (M = Cr, 20; V, 21•), and [(1,1,2,2-tetramethyl-1,2-di-η6,η6‘-phenyldigermane)Cr] (24) were synthesized by means of lithiation and subsequent reaction with dichlorodimethylgermane or dichlorodiphenylgermane. Metal−ligand cocondensation of bromodimethylphenylgermane with chromium atoms followed by reductive coupling with lithium naphthalide gave the digermane complex 24. Additionally, the nonbridged derivatives [bis(trimethylgermyl-η6-benzene)M] (M = Cr, 10d; V, 11•), [(trimethylgermyl-η6-benzene)(η6-benzene)Cr] (10m), and [bis(triphenylgermyl-η6-benzene)M] (M = Cr, 14; V, 15•) were prepared and characterized by 1H- and 13C-NMR (10m, 10d, 14, 17, 20), cyclic voltammetry (CV) (10d, 11•, 14, 15•, 18•, 21•, 24), and EPR spectroscopy (10d•+, 11•, 14•+, 15•, 18•, 21•, 24•+). Crystals of 20 were subjected to a structure determination by X-ray diffraction, which disclosed a be... |
| Databáze: | OpenAIRE |
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