Ferrocene end-capped palladium(II) and platinum(II) complexes with thiophene spacers

A series of heterobimetallics containing ferrocene and Pd(II) or Pt(II) hav e been synthesized by oxidative addition of ferrocene-substituted halothiop henes with zerovalent palladium or platinum precursors. The stable solids w ere thoroughly characterized by elemental analysis, NMR, UV-vis spectroscop y, and cyclic voltammetry. The rich redox chemistry of the complexes depend s on the conjugation length that separates the two metal sites. The crystal . structure of a platinum sigma-thienyl complex, (C5H5)Fe(C5H4CH=CH-th-Pt(P Ph3)(2)(Br)) (th = 2,5-disubstituted thiophene) has been determined.