Solvent-influenced syntheses and crystal structures of two azido-bridged polynuclear copper(II) complexes derived from 2-[(3-methylaminopropylimino)methyl]phenol with urease inhibitory activities

An end-on azido-bridged dinuclear Cu(II) complex, Cu₂L₂(μ_1,1–N₃)₂]·CH₃OH, and an end-on azido-bridged polynuclear Cu(II) complex, CuL(μ_1,1–N₃)]_n, derived from the Schiff base 2-(3-methylaminopropylimino)methyl]phenol (HL), were synthesized and characterized by physico-chemical and spectroscopic methods. The two complexes were synthesized and crystallized with different solvents, methanol for Cu₂L₂(μ_1,1–N₃)₂]·CH₃OH and ethanol for CuL(μ_1,1–N₃)]_n. The Cu atom in each complex is five-coordinate in a square pyramidal geometry with one O and two N atoms of L, and one N atom of an azide ligand defining the basal plane, and with one N atom of another azide ligand occupying the apical position. The urease inhibitory activities of both complexes were evaluated.