Substituted carbonyl derivatives of the Group VI transition metals. IV. Reactions of some arene-metal tricarbonyls with Triaryl-phosphine and -arsine ligands

Abstract

The reactions of triphenylphosphine and triphenylarsine with (π- arene)M(CO)₃ (M = Cr, Mo, W) to yield fac-M(CO)₃(RPh₃)₃ (R = P, As) have been reexamined. Anomalies in the earlier literature have been resolved by the isolation of two solid state forms of each complex and by a study of the decomposition products of these compounds. Tricarbonyl complexes of tritolyl-phosphines and -arsines are also reported and their behaviour suggests steric effects initiate decomposition. In addition, a number of (π-arene)M(CO)₃ compounds were shown to react with carbon monoxide to form M(CO)6.