[{Cp*(Cl)Re}2(μ-CO)2](Re ≡ Re), a dinuclear rhenium(II) complex with cis configuration of the terminal Cl atoms

Article abstract of DOI:10.1515/znb-1997-0615

The reaction of [{Cp*(OC)₂Re}₂](Re = Re) (1), Cp* = C₅Me₅, with CH₂Cl₂ yields the dinuclear rhenium complexes [{Cp*(Cl)Re}₂(μ-CO)₂](Re ≡ Re) (2) with cis orientation of the Cl atoms, [{Cp*(OC)₂Re}₂(μ-CH₂)](Re-Re) (3), a complex with a bridging CH₂-carbene ligand, and [{Cp*(OC)₂Re}₂(μ-C=CH₂)](Re-Re) (4), a μ-vinylidene(alkenylidene) compound. The structure of 2 has been confirmed by a single crystal X-ray structure determination. Starting with [Cp*Re-(CO)₂(thf)] (6) instead of 1 the reaction with CH₂Cl₂ affords cis-[Cp*Re(CO)₂(Cl)(CH₂Cl)] (7) by oxidative addition of dichloromethane.