Synthesis, molecular structure (M = Pd, X = OH) and reactivity of trinuclear asymmetric complexes [(C6F5)2Pt(µ-PPh2)2M(µ-X)2Pt(PPh3)2](M = Pd or Pt; X = Cl or OH)

Abstract

The tetranuclear complexes [NBu₄]₂[(C₆F₅)₂Pt(µ-PPh₂)₂M(µ-CI)₂M(µ-PPh₂)₂Pt(C₆F₅)₂](M = Pd or Pt) reacted with AgCIO₄ and cis-[PtCl₂(PPh₃)₂] in dichloromethane–acetone affording the neutral homo- or hetero-metallic asymmetric species [(C₆F₅)₂Pt(µ-PPh₂)₂M(µ-CI)₂Pt(PPh₃)₂]1 and 2. Treatment of their CH₂CI₂ solutions with KOH in methanol rendered the corresponding µ-hydroxo derivatives 3 and 4 which reacted with HX′(X′= Cl, Br, SPh, NHC₆H₄Me-p or PPh₂) to afford [(C₆F₅)₂Pt(µ-PPh₂)₂M(µ-X)(µ-X′)Pt(PPh₃)₂](X = X′= Cl 1, 2; Br 5, 6; SPh 7, 8; X = OH, X′= NHC₆H₄Me-p9, 10; X = OH, X′= PPh₂11, 12). The structure of 3 has been determined by single-crystal X-ray diffraction.