Abstract
New complexes of lanthanide perchlorates with 2- N-(pyridyl) benzamide (PyBA) of the type Ln(PyBA) 3(ClO 4) 3 where Ln Y and LaYb have been synthesised and characterised by analyses, conductance, IR, 13C NMR (for diamagnetic complexes only) and electronic spectra. The molar conductance and IR data point to the ionic nature of the perchlorate groups in the complexes. IR data along with the 13C NMR data unequivocally proves that the coordination of the ligand to the metal ions taken place in a bidentate fashion through the oxygen of the benzamide group and the nitrogen of the heterocyclic ring. From a comparison of the visible electronic spectral shapes of the Nd 3+, Ho 3+ and Er 3+ complexes with those reported in the literature, a 6-coordinate geometry around the metal ion has been assigned in all the complexes.
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