Studies on mixed ligand complexes: Part III. Mechanism of the reaction of heterocyclic amines with tristhiourea copper(I) chloride and iodides

Summary The mechanism of the reactions of heterocyclic amines with tristhiourea copper(I) chloride and iodides has been studied potentiometrically using silver-silver sulphide as an indicator electrode. The interaction of pyridine and dipyridyl with tristhiourea copper(I) chloride and iodides results in the formation of complexes such as [Cu(Tu) 2 Py 2 ] + , and [Cu(Tu) 2 Dipy] + . The formation of [Cu(Tu) 2 Py 2 ]Cl and [Cu(Tu) 2 )Dipy]I takes place through a dissociative mechanism but that of [Cu(Tu) 2 Dipy]Cl proceeds by an associative mechanism.