Spectroscopic studies on Cr(III), Mn(II) and Zr(IV) complexes with N-donor tetradentate (N4) macrocyclic ligand

摘要

Cr(III), Mn(II) and Zr(IV) complexes are synthesized with a novel tetradentate (N4) macrocyclic ligand and characterized by the elemental analysis, conductometry, magnetic susceptibility, UV–visible, FTIR, 1H NMR spectra, powder X-ray diffraction, and thermal analysis. From the microanalytical data, the stoichiometry of the complexes has been found to be 1:1 (metal:ligand) ratio. The TGA-DTA data suggest Cr(III) complex is having one nitrate ion, one water molecule and two coordinated nitrate ions, Mn(II) complex is having one lattice water molecule and two coordinated chloride ions and Zr(IV) complex is having one water molecule and two coordinated nitrate ions. The X-ray diffraction data suggest orthorhombic crystal system for Cr(III) and monoclinic crystal system for Mn(II) and Zr(IV)complexes.