Some lanthanide metal complexes of n-isonicotinamidosalicylaldimine

Abstract

Trivalent lanthanide complexes of the type K[ML 2] where M=La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III) and Dy(III) and H2 L=N-isonicotinamidosalicyladimine, have been prepared and characterised. The nephelauxetic ratio (β), covalency (δ) and bonding parameter (b 2) of K[Nd L 2] have been calculated. Infrared spectral studies reveal that N-isonicotinamidosalicylaldimine acts as a dibasic tridentate ligand. A coordination number six has been proposed for the lanthanide metal ions. © 1986 Indian Academy of Sciences.