THE PREPARATION AND X-RAY CHARACTERIZATION OF [(PPH2ME)2PT(MU-PPHH)2PT(PPH2ME)2][CL]4.3/2CH2CL2 AND [(PPH2ME)2PT(MU-PPHH)PT(PPH2ME)2][CL]2[PHPO2OH]2[PHPO(OH)2]2

Reaction of (PPh)5 with PtCl2(PR3)2 in CH2Cl2 gives [(PPh2Me)2Pt(μ-PPhH)2Pt(PPh2Me)2] [Cl]4· 3 2CH2Cl2 (1) or [(PPh2Me)2Pt(μ-PPhH)Pt(PPh2Me)2]- [Cl]2[PhPO2OH]2[PhPO(OH)2]2 (2) as shown by microanalyses and X-ray crystallography. The reaction appears (on the basis of 31P NMR) to proceed via trans-Pt(PR3)2(PPhH)Cl. The X-ray structures of 1 and 2 reveal, in both cases, planar coordination of the platinum atoms with a planar Pt2P2 central ring. The PPtP and PtPPt angles are 105 and 75°, respectively. All PtP bond lengths are equivalent. © 1990.