The asymmetric ONNO complexes of dioxouranium(VI) with N-1,N-4-diarylidene-S-propyl-thiosemicarbazones derived from 3,5-dichlorosalicylaldehyde: Synthesis, spectroscopic and structural studies


Ozdemir N., Sahin M. , Bal-Demirci T. , Ulkuseven B.

POLYHEDRON, vol.30, no.3, pp.515-521, 2011 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 3
  • Publication Date: 2011
  • Doi Number: 10.1016/j.poly.2010.11.030
  • Title of Journal : POLYHEDRON
  • Page Numbers: pp.515-521

Abstract

Two uranyl complexes having the composition [UO2(L)DMSO] were synthesized using salicyl- and 3,5-dichlorosalicylaldehyde-S-propyl-thiosemicarbazones as starting materials. The S-propyl-thiosemicarbazidato structures in the complexes are N-1-3,5-dichlorosalicylidene-N-4-salicylidene and N-1-salicylidene-N-4-3,5-dichlorosalicylidene. The stable solid complexes were characterized by means of elemental analysis, IR and H-1 NMR spectroscopies, and the single crystal X-ray diffraction technique. The two complexes, with the same formula, crystallize in different space groups. In the title complexes, the uranium atom is seven-coordinated in a distorted pentagonal-bipyramidal geometry involving an ONNO donor set of the thiosemicarbazidato ligand and an oxygen atom of a DMSO molecule. The two apical positions of the pentagonal bipyramid are occupied by the two oxygen atoms of the trans-dioxouranium group. The relative orientations of the DMSO and S-propyl groups in both complexes are somewhat different due to different crystal packing. (C) 2010 Elsevier Ltd. All rights reserved.