Interchange of SPh and PPh2groups at a dicobalt centre: crystal and molecular structures of [Co2(µ-PPh2){µ-SPhC(O)CHCH}(CO)4] and [Co2(µ-SPh){µ-PPh2CHCHC(O)}(CO)2{P(OMe)3}2

Abstract

The thermal reaction of [Co2(µ-PPh2){µ-SPhC(O)CHCH}(CO)4] with P(OMe)3 leads, in addition to carbonyl substitution, to a novel ligand rearrangement in which the PPh2 and SPh groups interchange positions, giving the new organometallic derivative [Co2(µ-SPh){µ-PPh2CHCHC(O)}(CO)2{P(OMe)3}2]; both complexes are characterised by X-ray diffraction studies.