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Synthesis, characterization, thermogravimetry, and structural study of uranium complexes derived from dibasic S-alkylated thiosemicarbazone ligands

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Two pentagonal bipyramidal complexes, ethanol-(S-ethyl-N 1,N 4-bis(3-methoxy-2-hydroxybenzaldehyde)-isothiosemicarbazide-N,N′,O,O′)-dioxidouranium(VI) (1) and ethanol-(S-ethyl-N 1-(2-hydroxyacetophenone)-N 4-(5-bromo-2-hydroxybenzaldehyde)-isothiosemicarbazide-N,N′,O,O′)-dioxidouranium(VI) (2), have been prepared and characterized. Their structures have been determined by X-ray crystallography, and the structural parameters are discussed with those observed in related complexes. Electronic absorption, proton magnetic resonance, and FT-IR spectra have been recorded and analyzed. In both complexes, the U(VI) centers are surrounded by N2O2 donor ligands, two oxido groups, and one ethanol in a distorted pentagonal bipyramid. The thermal stability of the new complexes has also been determined.
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Keywords: Crystallography; Isothiosemicarbazone; Spectra; Thermal stability; Uranium complex

Document Type: Research Article

Affiliations: 1: Research and Development Division of Maral Corporation, Mashhad, Iran 2: Institute of Physics of the ASCR, Prague, Czech Republic

Publication date: June 18, 2014

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