SYNTHESIS AND CHARACTERIZATION OF COMPLEXES OF LANTHANIDE NITRATES WITH N'-DINAPHTHYL-N,N'-DIPHENYL-3,6-DIOXAOCTANEDIAMIDE

Solid complexes of lighter lanthanide nitrates with ,N'-dinaphthyl-N,N 'diphenyl-3,6-dioxaoctanediamide (DDD), Ln(NO3)(3)(DDD) (Ln = La-Nd, S m) have been prepared in non-aqueous media. These complexes have been characterized by elemental analysis, conductivity measurements, IR spe ctra, electronic spectra and TG-DTA techniques. In all the complexes, DDD and NO; are coordinated to the lanthanide ions as tetradentate and bidentate ligands, respectively. The differences in the IR and electr onic spectra between these complexes and lanthanide nitrate complexes with N,N,N',N'-tetraphenyl-3,6-dioxapctanediamide (TDD) are discussed.