CHEMISTRY OF HETEROBIMETALLIC COBALT RHODIUM COMPLEXES

The complex [CoRh(CO)3(µ-dppm)2] (1), formed directly from Co(II) and Rh(III), reacts with CHCl3 or HgCl2 to give [CoRh(µ-Cl)(CO)2(µ-CO)(µ-dppm)2]+ (3a), with I2 to give [CoRh(µ-I)(CO)2(µ-CO)(µ-dppm)2]+ (3b), with sulfur to give [CoRh(µ-S)(CO)2(µ-CO)(µ-dppm)2] (3c), with H+ to give [CoRh(µ-H)(CO)3(µ-dppm)2]+ (4), and with Ph2PH to give [CoRh(µ-H)(µ-PPh2)(CO)2(µ-dppm)2] (5), all with retention of the heterobimetallic unit. The complexes have been characterized by spectroscopy and, for 1 and 5, by X-ray structure analysis. © 1990, American Chemical Society. All rights reserved.