Redox reactions between metal–metal multiple bonds and carbon disulfide

Abstract

Carbon disulfide is reduced by triply bonded complexes of the type [Re₂X₄(µ-LL)₂][X = Cl or Br; LL = Ph₂PCH₂PPh₂(dppm) or Ph₂AsCH₂AsPh₂(dpam)] to afford the edge-shared bioctahedral dirhenium(III) species [Re₂(µ-S)(µ-X)X₃(CS)(µ-LL)₂], which can in turn be converted to salts of the type [Re₂(µ-S)(µ-X)X₂(CS)(µ-LL)₂L′]PF₆(L′= MeCN, EtCN, p-toylCN, Bu^tNC or xylyINC) by reaction with TIPF₆ and L′ and to the µ-SO₂ complexes [Re₂(µ-SO₂)(µ-X)X₃(CS)(µ-LL)₂](LL = dppm) by treatment with NOPF₆ in dichloromethane.