Multiple Bonds between Main-Group Elements and Transition Metals. 135. Oxorhenium(V) Catalysts for the Olefination of Aldehydes

Wolfgang A. Herrmann, Peter W. Roesky, Mei Wang, Wolfgang Scherer

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102 Scopus citations

Abstract

Reaction of methyltrioxorhenium (MTO) (1) and triphenylphosphine in diethyl ether gives bis(triphenylphosphine)methyldioxorhenium(V)·MTO (3a), which was characterized by a single-crystal X-ray diffraction study (crystal data: space group Cc, a = 1393.5(4) pm, b = 1367.5(1) pm, c = 1928.0(5) pm, β = 102.67(1)°, Z = 4). An MTO molecule acts as an axial Lewis base ligand in this mixed-valence ReV/ReVII complex that is structurally composed of two trigonal bipyramids joined via an unsymmetrical, slightly bent oxo bridge ligand. Both phosphine ligands of the ReV fragment are in trans positions to each other while the methyl and oxo groups occupy equatorial sites. 3a as well as bis(triphenylphosphine)trichlororhenium(V) (4) are used as catalysts for the olefination of aldehydes with diazoalkanes.

Original languageEnglish
Pages (from-to)4531-4535
Number of pages5
JournalOrganometallics
Volume13
Issue number11
DOIs
StatePublished - 1 Nov 1994

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