The mechanism of metal-promoted 1,3-sulpur shifts involving the apparent insertion of carbon monoxide into a carbon–sulphur bond
Abstract
The isomerisation of the acyl chelate complex [[graphic omitted]R}(CO)2(η-C5H5)] into [[graphic omitted]R}(CO)2(η-C5H5)](R = Me or Pri), which involves a 1,3 shift of the SR group, has been shown to proceed via the mercapto vinyl complex [W{σ-C(CO2Me):C(CO2Me)SR}(CO)3(η-C5H5)], illustrating that the mechanism involves deinsertion of the acyl carbon monoxide followed by apparent insertion of co-ordinated CO into the C–S bond of the vinyl ligand.