Template Synthesis, Characterization, Electrochemical Behavior, Antimicrobial, Nematicidal and Pesticidal Activities of Palladium(II) Macrocyclic Complexes

Abstract

A new class of unsymmetrical palladium(II) macrocyclic complexes have been synthesized by template condensation reaction of the precursor, 2-[4-fluro-2-(2-oxo-1,2-diphenyl-ethylideneamino)-phenylimino]-1,2-diphenyl-ethanone (ML¹) with appropriate diamines 1,2- diaminoethane, 1,3- diaminopropane, 1,4- diaminobutane, 1,5- diaminopentane and 1,6- diaminohexane, respectively in the presence of PdCl₂.The reactions were carried out in 1:1:1 molar ratio. The precursor and its complexes have been characterized on the basis of elemental analyses, molecular weight determinations, conductance and magnetic susceptibility measurements and spectral studies including IR, ¹H-NMR,electronic,mass, spectra and X-ray powder diffraction studies.Based on analytical and spectral data, a four coordinated square planar geometry has been assigned for Pd(II) macrocyclic complexes. The redox properties of the complexes were extensively investigated by electrochemical method using cyclic voltammetry (CV). The in vitro antimicrobial activity of Pd(II) macrocyclic complexes was studied and compared with that of free ligand. These complexes were also screened for their nematicidal and pesticidal activities.

Keywords:

• Antimicrobial activity
• electrochemical behavior
• nematicidal activity
• pesticidal activity Pd(II) macrocyclic complexes
• spectral studies

Funding

The authors are grateful to UGC, New Delhi for financial assistance.