Tri- and tetra-nuclear homo- or hetero-metallic palladium(II) and platinum(II) complexes with double halide bridges. Molecular structure of [NBu4]2[(C6F5)2Pt(µ-Cl)2Pt(µ-Cl)2Pt(C6F5)2]

Abstract

By treating cis-[M(C₆X₅)₂(thf)₂](M = Pd or Pt, X = F or Cl, thf = tetrahydrofuran) with [M′X′₄]^2– or [M′₂(µ-X′)₂X′₄]^2–(M′= Pd or Pt; X′= Cl or Br) in a 2:1 ratio tri- or tetra-nuclear, homo- or heterometallic complexes of the types [NBu₄]₂[(C₆X₅)₂M(µ-X′)₂M′(µ-X′)₂M(C₆X₅)₂] or [NBu₄]₂[(C₆X₅)₂M(µ-X′)₂M′(µ-X′)₂M′(µ-X′)₂M(C₆X₅)₂] can be obtained. The molecular structure of the trinuclear anion with M = M′= Pt, X = F, X′= Cl has been established by single-crystal X-ray crystallography. The anion is centrosymmetric, showing a square-planar PtCl₄ central unit embraced by two Pt(C₆F₅)₂ terminal moieties bonded to the central platinum atom through double chloride bridges.