T B Singh
Articles written in Journal of Chemical Sciences
Volume 110 Issue 4 August 1998 pp 421-432 Inorganic And Analytical
The complexes of the type [Ln(H2 dapthsh)Cl(H2O)2]Cl2 (Ln=La, Pr, Nd, Sm, Eu, Gd, Tb and Dy; H2 dapthsh=2,6-diacetylpyridine 2-thenoyl salicyl dihydrazone) have been prepared by reacting salicylhydrazone (sh) with [Ln(Hdapth)Cl2(H2O)3]Cl (Hdapth=2,6-diacetylpyridine mono (2-thenoylhydrazone) in ethanol. The condensation of coordinated acetyl C=O with — NH2 of salicylhydrazone occurs and the resulting azomethine nitrogen is found bonded to the Ln(III) ions. The compound has been found monomeric from FAB mass spectra. The bonding sites of the dihydrazone and coordination number and symmetry of the ligand field around Ln3+ ions have been deduced from IR, electronic and emission spectra.
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