COMPLEXES OF LANTHANIDE PERCHLORATES WITH N,N,N',N'-TETRAMETHYL PYRIDINE DICARBOXAMIDE

The synthesis and a study of the physical properties of lanthanide perchlorate complexes with N,N,N′,N′ Tetramethyl pyridine dicarboxamide of the general formula Ln(ClO4)3 (tmpd)3 where Ln = La-Yb and Y and tmpd = N,N,N′,N′ Tetramethyl pyridine dicarboxamide have been made. Conductance and infra-red data show that all the perchlorates are ionic. Infra-red spectral data suggest that the co-ordination of the ligand occurs through the oxygen atoms of the two amide moieties and through the pyridine nitrogen. Proton NMR spectra of the diamagnetic Y and La complexes confirm bonding through the pyridine nitrogen. Electronic spectral data for the Pr, Nd, Ho and Er complexes are also reported. A co-ordination number of nine has been assigned for all the complexes. © 1979, Taylor & Francis Group, LLC. All rights reserved.