The oxygenation of the electron-rich triple bond in the complexes [Re2X4(µ-dppm)2][X = Cl or Br; dppm = bis(diphenylphosphino)methane]. Multielectron redox behaviour involving retention of the Re2X4P4 unit
Abstract
The reactions of the triply bonded complexes [Re2X4(µ-dppm)2](X = Cl or Br; dppm = Ph2PCH2PPh2) with O2 proceed to give the products [Re2(µ-O)(µ-X)(O)X3(µ-dppm)2] and [Re2(µ-O)(O)2X4(dppm)2] in high yield in which net four- and six-electron redox reactions have occurred and the integrity of the ligand sets of the precursor complex is preserved.