Synthesis ,Characterization and Kinetic Study of Metal Complexes with new acyclic Legend N2O2

Abstract

The complexes of a new tetra dentate acyclic ligand derived from 1,2-diamino propane and 3-acetyl-4-hydroxy-6-methyl-pyrane-2-one ,with vanadium(IV), Cr(III), F(II), Fe(III), Mn(II), Co(II), Ni(II), and Cu(II) have been synthesized and characterized on the bases of their elemental analysis, conductivity, magnetic moments in addition to spectral data of H1 NMR ,I.R. and U.V.-Visible. Spectra. Metal to ligand ratio in all complexes has been found to be 1:1.The Schiff base behaves as neutral tetra dentate legend with N2O2 system. Cr(III), Fe(III), Mn(II), Co(II), and Cu(II) complexes have been assigned octahedral stereo chemistry, Ni(II) complex has been suggested as square planer geometry, while V(IV) complex was square pyramid. The thermodynamic parameters such as ∆G*,∆H* and ∆S* are calculated from the curve of logKs verse temperature. It is found that Ni(Π) and Cu(II) are the most stable complexes, from the data of formation constant and Gibbs free energy.