Heteroligand Complexes of Copper(II) with Malonic and Adipic Acids Dihydrazides and L-Histidine

Abstract

© 2020, Pleiades Publishing, Ltd. Abstract: Using the methods of pH-metry and mathematical simulation, we studied the complex formation in the copper(II)–malonic (L)/adipic acid (L')–L-histidine (HisH) ternary systems in aqueous medium against 1.0 M KNO3 solution at 25.0°C. The stability constants of (1 : 1 : 1) heteroligand complexes were determined. Quantum chemical calculations of the structures of heteroligand complexes were performed. It was revealed that the Cu(His)(L)+ and Cu(His)(L')+ complexes exist predominantly in the cis-form.