Rhodanine complexes of copper(I), palladium(II) and platinum(II)

The preparation of copper(I), palladium(II) or platinum(II) complexes with 5-methylrhodanine, 3-allylrhodanine, 3,3′-ethylenebisrhodanine and 3,3′-butylenebisrhodanine are described. The coordination in the complexes takes place through the thiocarbonyl group of the ligand. Copper forms 1:1, 1:2 and 3:4 complexes with 5-methylrhodanine. The i.r. spectrum of the complex Cu(3-allylrhodanine)Cl suggests that copper is bonded via the thiocarbonyl group and the olefinic double bond of the ligand. The ligands 3,3′-ethylenebisrhodanine and 3,3′-butylenebisrhodanine form 1:1 complexes with copper and palladium.