Abstract
Abstract A new series of complexes of rare earth perchlorates with the Schiff base 1, 2-(diimino-4′-antipyrinyl)ethane (GA) having the general formula [Ln(GA) 2 (C1O4)] (C1O4) 2, where Ln = Y, La, Pr, Nd, Sin, Eu, Gd, Dy, Ho and Er, have been prepared and characterised by elemental analyses, electrical conductance in non-aqueous solvents, infrared, proton NMR (M = Y, La) and electronic spectra, magnetic moments and thermogravimetric analyses. The Schiff base GA acts as a tetradentate neutral ligand, coordinating through both carbonyl oxygens and both azomethine nitrogens. One of the perchlorate groups in these complexes is coordinated in monodentate fashion to the metal ion. A coordination number of nine is assigned to the metal in these complexes.
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