Abstract
Complexes of diphenylphosphinoacetic acid (POH) with platinum group metal ions are reported. Reaction of an excess of POH with the rhodium(I) complex RhCl(PPh 3) 3 resulted in the formation of the octahedral Rh(III) complex fac-Rh(PO) 3 by the oxidative addition of protons to the Rh(I) species. Reaction of RhCl(PPh 3) 3 with POH in a 1:2 molar ratio however, gave the square planar Rh(I) complex Rh(PO)(POH)(PPh 3). Interaction of POH with the Rh(I) and Ir(I) square planar complex MCI(CO)(PPh 3) 2 in a 2:1 molar ratio gave complexes of the type trans-M(PO)(POH)(CO). The reaction of PdCl 2(C 6H 5CN) 2 and K 2PtCl 4 with POH in a 1:2 molar ratio gave complexes of the composition cis-M(PO)(POH)Cl. Interaction of RhCl 3 and IrCl 3 with POH in a 1:3 molar ratio resulted in the formation of complexes of the type M(PO) 2(POH)Cl (M = Rh(III) and Ir(III)). The complexes were characterized by 1H, 13C, 31p, NMR and IR spectroscopy.
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