Synthesis and Modeling of Water Soluble Mixed Triamine/Diamine/Copper (II) Complexes and their Antibacterial Activities

Triamine and diamine ligands were mixed to prepare several copper(II) complexes of general formula [Cu(dien)NN]X2. [dien = diethelenetriamine and NN is diamines like: en = ethylenediamine or Me4en = N,N′,N,N′-tetramethylethylenediamine (1-14) and X : is Br or Cl ] under ultrasonic mode with a relatively high yield. These complexes were characterized by elemental microanalysis, UV visible IR spectroscopy, thermal and electrochemical techniques. In addition, complex 7 structure was solved by X-ray single crystal and treated with Hirshfeld surface analysis. This complex exhibited a distorted square pyramidal coordination environment around Cu(II) centre. The solvatochromism of the desired complexes was investigated in water and other suitable organic solvents. The results showed that the Guttmann’s DN parameter values of the solvents have mainly contributed to the shift of the d–d absorption band towards the linear increase in the wavelength of the absorption maxima of the complexes. Most of the complexes showed higher antibacterial activity against the studied microorganisms than other.