Organochalcogenido-bridged dimeric 2-methylallylpalladium complexes: synthesis, structure and their transformation into palladium chalcogenides

Organochalcogenido-bridged dimeric 2-methylallylpalladium complexes of the type [Pd2(μ-ER)2(η3-C4H7)2] (1) [ER = SBut (1a), SPh (1b), SC6F5 (1c), SePh (1d), TePh (1e)] have been prepared. The structure of the SBut bridged complex has been established by single crystal X-ray diffraction analysis. The four-membered Pd2S2 ring adopts a non-planar conformation with the two η3-2-MeC3H4 (η3-C4H7) in a syn configuration. The thermal behaviour of these complexes has been investigated by thermogravimetric analysis. These complexes yield Pd4E (E = S or Se) or Pd3Te2 at moderately low temperatures.