Abstract

Synthesis and Spectroscopic Studies of Some Lanthanon Complexes of N,O Donor Schiff

Author(s): Shobh Nath Pandey & S.P.Tripathi

The 2,6-diacetyl pyridine-2-furoyl salicyldihydrazone Schiff’s base synthesized and reacted with LnCl3,the molecular formula [Ln(H2dapfhsh)Cl(H2O)2]Cl has been established for the complexes from analytical molar conductance data.Based on the results and discussion given below,it is concluded that the complexes have 1:1 metal-ligand stoichiometry. The hydrazone is bonded to the metal ions in tetradentate fashion through the carbonyl oxygen, azomethine nitrogens and pyridine nitrogen. A coordination number seven around the Ln (III) ion is evident from stoichiometry of the complexes and also from electronic spectra of the Nd (III) complex. Thus, a pentagonal bipyramidal structure proposed for the complex.

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