SYNTHESIS AND SPECTRAL INVESTIGATION OF RARE EARTH(III) COMPLEXES OF AMIDO ACID LIGAND DERIVED FROM 2,4-DINITROPHENYLHYDRAZINE

摘要

Fourteen rare earth (III) complexes REL(3) . nH(2)O (where RE = Sc, n = 5; RE = Y, La, Ce, Sm; Eu, Gd, Tb, Dy, Ho, Er, Yb, n = 6; RE = Pr, Nd, n = 4; HL = 1-(N-carboxymethyl-N-phenyl)amino-acetyl-2',4'-dinitrophenylhydrazine), have been synthesized and characterized by elemental analyses, conductance measurements, magnetic moments, IR,H-1 NMR, electronic spectra, TG and DTA. Their nephelauxetic ratio (beta), bonding parameter (b(1/2), Sinha's parameter (delta%) and covalency angular overlap parameter (eta) have been determined for the Pr3+, Nd3+ and Er3+ complexes. [References: 14]