Tricyclohexylarsine (L) complexes of Ir and Rh carbonyls were prepd. Thus, treating the carboxylation mixt. from Rh halides with L gave RhXL2(CO) (X = Br, Cl) which added X2 to give RhX3L2(CO). Treating the Ir analogs with HX gave IrHX2(CO)L2, which by dehydrohalogenation gave mixed IrX(CO)L2 and IrX(CO)(O)2L2
