Substituted thiourea complexes 1 complexes of some Summary A series of new Pt n and Pd I1 complexes of N,N'-disubstituted thiourea derivatives of general formulae [MLCI2]2, [MLzCI;] and [ML4]CI 2 have been prepared and characterised by physicochemical and spectroscopic methods. The reaction of these ligands with [M(DMSO)2CI2], M = Pt, cis-or Pd, trans-, in CHC13 and EtOH at ambient temperature or under reflux, is described.