Novel cationic palladium(II) and platinum(II) diolefin derivatives

Abstract

The complexes [M(C₁₀H₁₂·OMe)X]₂ and [M(C₁₀H₁₂·OMe) py X](M = Pd^II, Pt^II; C₁₀H₁₂OMe = dicyclopentadienemethoxide; X = Cl or Br) react with bidentate ligands L–L(1,2′,-bipyridyl, ethylenediamine, 1,2-bisdiphenyl-phosphinoethane) in various solvents to give stable salts of the cations [M(C₁₀H₁₂·OMe)(L–L)]⁺. The conductometric course of these reactions is reported. I.r. spectra are discussed to support the formulation of these cations, which bear both an alkyl and an olefin group linked to the central metal. Stability of such unusual d⁸ metal ion co-ordination is discussed in terms of chelating effect.