The complexes: RhCl(P–N)(THP), where P–N is P,N-chelated o-diphenylphosphino-N,N-dimethylaniline and THP is tris(hydroxymethyl)phosphine, and RhCl[(O)P–N][THP(O)] containing O-bonded phosphine oxides

The complex RhCl(P–N)(THP) (1) is synthesized under argon from RhCl(cod)(THP) and P–N, and is structurally characterized; P–N = P,N-chelated o-diphenylphosphino-N,N-dimethylaniline, THP = tris(hydroxymethyl)phosphine, and cod = 1,5-cyclo-octadiene. The corresponding synthesis in air yields RhCl[(O)P–N][THP(O)] (2), containing O-bonded phosphine oxide ligands.