Microwave-assisted synthesis, structural elucidation, antimicrobial and pesticidal activity of heterobimetallic complexes of Copper(II)

The present study was aimed to synthesize and characterize monometallic complex of Cu(II) using different diamines, i.e., 4-chloro-1,2-phenylenediamine and 4-fluoro-1,2-phenylenediamine, in the presence of CuCl2 to form complexes of the type [Cu(C12H14N4Cl2)]Cl-2 and [Cu(C12H14N4FCl)]Cl-2. These synthesized complexes were further treated with organotin dichlorides (R2SnCl2), where R = CH3 and C6H5 for the synthesis of heterobimetallic complexes. The complexes have been synthesized using both conventional and microwave heating techniques. The complexes synthesized have been further characterized by elemental analysis, infrared spectra, electronic spectra, ESR, conductance measurement, mass spectra and X-ray powder diffraction studies. On the basis of these studies, distorted octahedral geometry has been proposed for the heterobimetallic complexes synthesized by utilizing monometallic complexes. The newly synthesized complexes have been screened for their antimicrobial activity. The results obtained were compared with the standards used during antifungal and antibacterial activity (i.e., Bavistin and Streptomycin). The pesticidal activity of these complexes was also evaluated against nymph and adult species of Chrotogonus trachypterus by taking into consideration their mortality rate. Graphic abstract Environmentally benign synthesis of biologically potent heterobimetallic complexes of copper.