SPECTRAL STUDY OF COMPLEXATION OF 5-TRI[2-(DIPHENYLPHOSPHINYL)ETHYLAMINO]CYCLOHEXANE WITH COPPER(II) AND COBALT(II) IONS

The complexation of 5-tri[2-(diphenylphosphinyl)ethylamino]cyclohexane (L1) with Cu2+ and Co2+ cations has been studied in different solvent s by means of UV-Vis, ESR, and IR spectroscopy. It has been shown that in the CuL1 complex the metal ion is pentacoordinated by three nitrog en atoms and two phosphinyl groups of the ligand and has a tetragonal- pyramidal environment. The conformation of the coordination polyhedron for the CuL1 complex depends on the solvent. In the CoL1 complex, as well as in the CoL2 complex, where L2 is -diphenylphosphinylethyl)-1,4 ,7-triazacyclononane, the Co2+ ion has an octahedral environment and i s bound to all donor atoms of the ligands.