Preparation and structural characterisation of a novel palladium (II) binuclear complex containing triazole bisthiosemicarbazone bridges

A new polidentate ligand, 3,5-diacyl-1,2,4-triazolebis(4-methylthiosemicarbazone), (H5L) has been synthesised; complexation of this ligand with Li2PdCl4 leads to a novel stable [Pd2(μ-H3L)2] macrocyclic cage which was characterised by X-ray crystallography. The ligand coordinates to the Pd atoms in a new tridentate fashion, forming a chelating and a bridging bonding modes.