Journal article Open Access

Synthesis and Structural Studies of some Trivalent l anthanide Metal Complexes of Salicylaldehyde (N-o-Hycdroxybenzalidene)tyrosyl Hycdrazone

T. R. RAO; I. A. KHAN; R. C. AGGARWAL

Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi-221 005

Manuscript received 7 October 1985, accepted 6 February 1986

Salicylaldebyde (N-o-hydroxybenzalidene)tyrosyl hydrazone (SalTH) has been found to form complexes of the types [M(SaITH)Cl3,(H2O)]2H2O and M(SalTH—3H)-(H2O). where M =LaIII, PrIII, NdII. SmIII, EuIII, GdIII and DyIII. The complexes have been characterised by elemental analysis, molar conductance, magnetic suscepti­bility, infrared, electronic and pair spectroscopy. The nephelauxetic ratio (\(\bar{(β)}\)), cavalency (\(\delta\)) and the bonding parameter (b2/3) have been calculated for the neodymium com­plexes. Infrared spectral studies show that the SaITH acts as a neutral bidentate ligand in the adduct complexes and as a tribasic pentadentate one in the neutral com­plexes. A coordination number six has been proposed around the metal ion in all the complexes.

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