Tetradentate diamido-bis-sulfide ligands on the base of o-aminobenzenethiol and their complexation with NiII,CoII, CuII chlorides in DMF solution and on the gold electrode surface

A series of cyclic and acyclic diamido-bis-sulfide ligands were synthesized by N-acylation of 1,2-bis(2-aminophenylthio)ethane and 1,4-bis(2-aminophenylthio)butane with acetic, malonic, and 3,3′-dithiodipropionic acid chlorides or esters. The complexation of obtained ligands with Cu^II, Ni^II, and Co^II salts in solution and on the gold electrode surface was studied. The formation of complexes of these ligands with copper(II) chloride in DMF is irreversible and accompanied by deprotonation of the amide nitrogen atoms.