Separation of Copper(II), Nickel(II), Palladium(II), and Cobalt(II) Chelates with 4-S-Benzyl-l-p-Cl-phenyl-5-phenyl-2,4-isodithiobiuret (BPPTB) from Their Binary Mixture by Adsorption Thin-Layer Chromatography

Abstract

Abstract In the present work a suitable solvent system for the separation of Cu(II), Ni(II), Co(II), and Pd(II) as their chelates with 4-S-benzyl-1-p-Cl-phenyl-5-phenyl-2,4-isodithiobiuret (BPPTB) from their binary mixtures has been suggested. The most applicable solvent system has been found to be benzene-cyclohexane (3: 1). The best separation is achieved within 15 min. RF values of Ni-(BPPTB)2 and Co-(BPPTB)2 decrease with time. The substitution of benzene in a benzene–cyclohexane (1:1) solvent mixture by toluene decreases the RF value of metal chelates. Cu-(BPPTB)2 and Pd-(BPPTB)2 chelates do not migrate even with an increase in temperature. The RF value of Ni(BPPTB)2 chelate increases with temperature, whereas the RF value of Co-(BPPTB)2 remains practically constant.