Spectral and Lattice Parameters of Transition Metal Complexes of Polydentate Schiff Bases Derived from3-Formyl 4-Hydroxy Coumarin and 4-Amino phenol/2-Amino benzoic acid

Abstract

Metal(II) complexes of type M(L¹)₂.nH₂O and M(L²)₂.nH₂O [where M = Mn(ll), Co(II), Ni(II), Cu(II), L¹ = Schiff base derived from 3-formyl-4-hydroxy coumarin and 4-amino phenol, L² = Schiff base derived from 3-formyl-4-hydroxy coumarin and 2-amino benzoic acid, n = 0,1,2] have been prepared and characterized by different physico-chemical methods like, IR, ESR, NMR, X-ray, UV-Vis, etc. Molar conductivity measurements indicate that the complexes are non-electrolytic in nature. Magnetic measurements and electronic spectra indicate that some complexes exhibit octahedral geometry and others exhibit square-planar geometry. The analytical data indicate that metal to ligand stoichiometry in M(L¹) complexes are 1 : 2 and M(L²) complexes are 1 : 1.