Isolation and characterization of a cationic 19-electron iron(III) hydride complex; electron transfer induced hydride migration by carbon monoxide at an iron(III) centre

Abstract

The first hypervalent 19-electron metal hydride complex [Fe(C₅Me₅)(dppe)(CO)H]PF₆3, synthesized from the 17-electron iron(III) hydride complex [Fe(C₅Me₅)(dppe)H]PF₆2, is isolated and its structure is established by IR, Mössbauer and ESR data; reaction of the iron(III) complex 2 with carbon monoxide causes hydride transfer to the C₅Me₅ ligand through an electrochemical chemical electrochemical (ECE)-like pathway [dppe = ethylenebis-(diphenylphosphine)].