Metal Complexes of Sulphur Nitrogen Chelating Agents, II. <stitlu>2-Amino Cyclopentene-1-dithiocarboxylic Acid Complexes of Cu(I), Rh(I) and Hg(II)</stitlu>

Abstract

2-Amino cyclopentene-1-dithiocarboxylic acid (ACDA) reduces Cu(II) and Rh(III) to form univalent complexes of composition Cu(ACDA), 2 H 2 O and Rh(ACDA) 2 H 2 O, the oxidised species being a dimer of ACDA. The Cu(I) may be obtained in higher yield by reacting cuprous iodide with ammonium salt of ACDA. A compound of composition Rh(ACDA) (PPh 3 ) (H 2 O) is obtained by reacting ACDA with Rh(PPh 3 ) 3 Cl. With Hg(II) a normal bis complex is formed. The compounds have been characterized by their infrared and electronic spectra, magnetic moment measurement and thermal analysis. In the complexes bonding occur through NH 2 and deprotonated thiol group. A tentative mechanism for the formation of reduced metal complexes has been suggested.