Synthesis and study of N-(1-phenylethylidene)-N-(4H-1,2,4-triazol-4-yl)amine, N′-(4H-1,2,4-triazol-4-yl)benzamidine, and cobalt(ii), nickel(ii), and copper(ii) complexes based on these ligands

Abstract

Methods were developed for the synthesis of complexes of CoII, NiII, and CuII nitrates and chlorides with N-(1-phenylethylidene)-N-(4H-1,2,4-triazol-4-yl)amine (L1) and N′-(4H-1,2,4-triazol-4-yl)benzamidine (L2). The CoII and NiII complexes have a linear trinuclear structure. The CuII complexes are polynuclear. Both ligands are coordinated to the metal ions in a bidentate-bridging mode through the N(1) and N(2) atoms of the heterocycle. In all compounds, the coordination polyhedron can be described as a distorted octahedron. The molecular and crystal structure of the [Ni3(L1)6(EtOH)2(H2O)4](NO3)6·2EtOH·4H2O complex was established.