Stability and structure of transition-metal complexes of azoles in aqueous solutions. Part 21. A comparison of the complex-forming capacity of 1,2-dimethylimidazole with that of other 1,3-diazoles

Abstract

Stability constants have been determined for 1,2-dimethylimidazole (dmim) complexes of Co^II, Ni^II, Cu^II, and Zn^II by potentiometric method. Both tetrahedral and octahedral compounds are formed in the series [Co(OH₂)_n(dmim)_x]²⁺ in aqueous solutions. The configurational equilibrium octahedron ⇌ tetrahedron has also been found for Zn^II.