Complexation processes of CuII with imidazole

The purpose of the study is to investigate the complexation process in the heterogeneous Cu(0)-Cu(II)-imidazole-water system by the classical Clark-Nikolsky oxidation potential method at a temperature of 288.15 K and a solution ionic strength of 1.0 mol/L. The authors found the formation of the following coordination compounds in this system: [Cu(HL)2]3+, [CuHL(OH)]2+, [Cu(HL)2(OH)]2+, [Cu2(HL)2(OH)2]4+, [Cu2(HL)2(OH)3]3+. The complexation process proceeds in a rather wide pH range from 1.0 to 10.5.