Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen. LVII. Alkyl- und Aryl-Komplexe der Organorhenium-Reihe

Wolfgang A. Herrmann, Martina Flöel, Eberhardt Herdtweck

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Both the mono- and dialkyl derivatives formulated as (η5-C5Me5)ReO(Cl)R (4f-g) and (η5-C5Me5)ReOR2 (3a-g), respectively, are formed upon treatment of dichloro(oxo) (η5-pentamethylcyclopentadienyl)rhenium(V) (1) with the corresponding Grignard reagents. The dimethyl- (3a), dibenzyl- (3e), diphenyl (3f), and trimethylsilylmethyl- (4g) complexes were characterized by single crystal X-ray diffraction studies. The highest degree of unsymmetry of the C5Me5 complexation is found in the diphenyl derivative 3f. This effect to a large extent is attributable to the pronounced trans influence of the oxo ligands. The crystallographically characterized η3-allyl complex (η5-C5Me5)Re(η3-C3H5)Br2 (5) of pseudo-tetrahedral geometry is formed from 1 and allylmagnesium bromide. Reaction of the "di-Grignard reagent" (CH3)2C(CH2MgBr)2 (2i) with 1 yields the first stable rhenacyclobutane (η5-C5Me5)Re(CH2C(CH3)2CH2)O (3i).

Original languageGerman
Pages (from-to)321-338
Number of pages18
JournalJournal of Organometallic Chemistry
Issue number1-3
StatePublished - 20 Dec 1988

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