Synthesis and characterization of UO2 VI, ThIV, ZrOIV and VOIV complexes with Schiff base derived from ethylene diamine/orthophenylene diamine and diacetyl monoxime

P.G. Department of Chemistry, Sambalpur University, Jyoti Vihar, Burla, Sambalpur-768 019, Orissa, India

E-mail : dhruba_dash@yahoo.co.in

Manuscript received 16 April 2008, revised 1 July 2008, accepted 1 August 2008

A series of complexes of the type [M(L)(NO₃)₂].mH₂O and [VO(L)(SO₄)].2H₂O, where L is a Schiff base 1,10-dihydroxy-2,3,8,9-tetramethyl-1,4, 7, 10-tetraza-dec-1,3, 7 ,9-tetraene (DHTTDT) or 5:6-benzo-1, 10-dihydroxy-2,3,8,9- tetramethyl-1,4, 7, 10-tetraza-dec-1 ,3, 7 ,9-tetraene (BDHTTDT) derived from ethylenediamine/o-phenylene diamine and diacetyl monoxime have been synthesized (M = ZrO^IV, UO₂^VI and Th^IV; m = 1, 2 and 3 respectively). All the complexes are characterized on the basis of elemental analysis, thermal analysis, molar conductivity, magnetic moment, electronic, infrared, ¹H NMR and ESR spectral studies. The results indicate that the VO^IV ion is penta co-ordinated yielding paramagnetic complexes where as UO₂^VI, ZrO^IV ions are hexa co-ordinated and Th^IV ion is octa co-ordinated yielding diamagnetic complexes of above composition.