Insertion reactions of the [RhCl(PPh3)2] fragment into a phosphirene ring, and carbonylation of the resulting rhodium(III) complex. Crystal and molecular structures of [RhCl(PPhCPh
CPh)(PPh3)2], [RhCl(PPhCPh
CPhCO)(PPh3)2] and the novel dimeric complex [{RhCl(PPhCPh
CPhCO)(PPh3)}2]
Abstract
The first example of insertion of the d8 RhI fragment [RhCl(PPh3)2] into a phosphirene ring system results in a five-coordinate RhIII complex, which undergoes insertion of carbon monoxide to give either monomeric [[graphic omitted]O)(PPh3)2] or dimeric [{[graphic omitted]O)(PPH3)}2], the structures of which have been elucidated by NMR spectroscopy and single-crystal X-ray diffraction studies.