Elucidation of the reversible carbon monoxide reactions of a paramagnetic rhodium(II) complex
Abstract
Coordination of carbon monoxide to the rhodium(II) ether–phosphine complex [Rh(tmpp)2][BF4]21[tmpp = tris(2,4,6-trimethoxyphenyl)phosphine] initiates a redox reaction to produce the rhodium(III) complex [Rh(tmpp)2][BF4]32 and the dicarbonyl rhodium(I) species [Rh(tmpp)2(CO)2][BF4]3; the latter readily loses a CO ligand to form [Rh(tmpp)2(CO)][BF4]4 which enters into a second redox reaction with 4 to regenerate the original rhodium(II) radical 1.