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Department of Chemistry, National Institute of Technology, Kurukshetra-136 119, Haryana, India School of Coordination Chemistry, D Wing, Ushanagar, Bhandup, Mumbai-400 078, India Department of Chemistry, GIMT, Kanipala-136 118, Kurukshetra, Haryana, India Department of Chemistry, B. P. R. College of Engineering, Gohana-131 301, Haryana, India E-mail : dkumar_nitk@yahoo.com; arunsyamal@yahoo.co.in; anju_guptac@gmail.com; vandana _p71 @rediffmail. com; mukeshrani@gmail. com Manuscript received 07 March 2011, revised 12 October 2011, accepted 17 October 2011 A MeOH solution of salicylaldehyde and o-hydroxyphenylurea in equimolar ratio reacts and forms the Schiff base, LH3 (1). The latter reacts with Cull, ZnII, CdII, Moll, CoII, NiII, FellI, Mo02II, UO2II and Zr(OH)2II ions in MeOH and forms the corresponding .coordination compounds, [Cu(LH)]2 (2), [M(LH)(MeOH)] (M = ZnII, CdII) (3), [M'(LH)(MeOH)z)z (M' = MnII, CoII or Nill) (4), [FeCI(LH)(MeOH)]2 (5), [M"O2(LH)(MeOH)] (M" = MoVI or UVI) (6 and 7) and [Zr(OH)2(LH)(MeOH)2] (8) respectively. The coordination compounds have been characterized on the basis of elemental analyses, molecular weight, molar conductance, spectral (IR, renectance, NMR), thermal and magnetic susceptibility measurements. 1 acts as a dibasic tridentate ONO donor ligand in 2-8. The coordination compounds 2, 4 and 5 are paramagnetic, while 3, 6, 7 and 8 are diamagnetic. A square-planar geometry to 2; a tetrahedral geometry to 3; an octahedral geometry to 4, 5, 6 and 7 and a pentagonal-bipyramidal geometry to 8 have been assigned. The energy optimized structures, 9, 10 and 11 for 1, 3 (M = ZnII) and 6 respectively are proposed using the semiempirical ZIND0/1 quantum mechanical calculations. |
