The square-planar complex trans-[PdCl 2 {Ph 2 PCH 2 S(O)Me}{MeOH}] has been prepared. The compound cyrstallizes as orange-red prisms in the monoclinic space group P2 1 n, with a=9.446(2), b=14.858(3),c =13.578(3) , β=105.08(2)° and Z=4. The structure was determined by direct methods and refined to R=0.027 and R w =0.041. All atoms including hydrogens were located directly from Fourier difference maps. The coordination geometry around palladium is square-planar. The metal is coordinated to the two chlorines, the oxygen of methanol and the phosphorus of the sulfinyl-substituted ligand. In solution, a similar structure is assigned to the complex by NMR studies. In contrast to the previously documented Ph 2 PCH 2 CH 2 S(O)Me analogue, the sulfoxide function in the Ph 2 PCH 2 S(O)Me ligand is not involved in any coordination bondings with palladium, both in the solid state and in solution.