Polynuclear Homo- or Heterometallic Palladium(II)−Platinum(II) Pentafluorophenyl Complexes Containing Bridging Diphenylphosphido Ligands. 6.† Syntheses and Molecular Structure of [Pt4(μ2-PPh2)4(C6F5)4(CO)2]·2CH2Cl2 and [Pt2Pd2(μ2-PPh2)2(μ3-PPh(1,2-η2-Ph)-κ3P)- (C6F5)3(CO)(PPh2C6F5)]·CHCl3·C5H12

The reaction of [NBu 4 ] 2 [{(C 6 F 5 ) 2 Pt(μ-PPh 2 ) 2 Pt(μ-Cl)} 2 ], A, with CO in CH 2 Cl 2 gives the expected dinuclear compound [NBu 4 ][(C 6 F 5 ) 2 Pt(μ-PPh 2 ) 2 PtCl(CO)], 1, which reacts with AgClO 4 (1:1 molar ratio) in CH 2 Cl 2 to produce the tetranuclear cluster [Pt 4 (μ-PPh 2 ) 4 (C 6 F 5 ) 4 (CO) 2 ], 2 . The analogous complex [NBu 4 ] 2 [{(C 6 F 5 ) 2 Pt(μ-PPh 2 ) 2 Pd(μ-Cl)} 2 ], B, does not react with CO under similar conditions, but treatment of B with AgClO 4 (1:2 molar ratio, CH 2 Cl 2 ) renders the tetranuclear compound [Pt 2 Pd 2 (μ-PPh 2 ) 3 (C 6 F 5 ) 3 (PPh 2 C 6 F 5 )], 3, in which the PPh 2 C 6 F 5 ligand is produced through an unusual M−PPh 2 /M−C 6 F 5 reductive coupling. Complex 3 reacts with CO in CH 2 Cl 2 producing the tetranuclear complex [Pt 2 Pd 2 (μ-PPh 2 ) 2 (μ 3 -PPh(1,2-η 2 -Ph)-κ 3 P )(C 6 F 5 ) 3 (CO)(PPh 2 C 6 F 5 )], 4 . The molecular structures of complexes 2 and 4 have been established by X-ray crystallography.