Preparation and thermal decomposition of some (butane-1,4-diyl)platinum(IV) complexes

Abstract

The polymeric (butane-1,4-diyl)(platinum(IV)complexes [{ptXMe[(CH₂)₄]}_n](X = Br or I) have been prepared by reaction of [Pt{(CH₂)₄}(cod)](cod = cyclo-octa-1,5-diene) with MeBr or MeI, and react with ligands to give [PtXMe{(CH₂)₄}L₂][X = Br, L = PMe₂Ph; X = I, L =½(2,2′-bipyridine), PMe₂Ph, PMePh₂, ½ Ph₂PCH₂CH₂PPh₂] or [{PtMe[(CH₂)₄]I(py)}₂] when L = pyridine. The complexes [PtXMe{CH₂)₄}(PMe₂Ph)₂] have also been prepared by oxidative addition of MeX (X = I, Br, or Cl) to [Pt{(CH₂)₄}(PMe₂Ph)₂], and [Pt{(CH₂)₄}I₂(PMe₂Ph)₂] has been prepared from iodine and [Pt{(CH₂)₄}(PMe₂Ph)₂]. A study has been made of the products of thermal decomposition of the (butane-1,4-diyl)platinum(IV) complexes, and possible mechanisms of decomposition are discussed.