Synthesis and characterization of dinuclear vanadium(V) oxido peroxido tartrato complexes |
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| Authors: | Jana Gáliková Jozef Tatiersky Erik Rakovský Peter Schwendt |
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| Institution: | 1.Faculty of Natural Sciences, Department of Inorganic Chemistry,Comenius University,Bratislava,Slovak Republic |
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| Abstract: | Vanadium(V) oxido peroxido tartrato complexes have been prepared from aqueous-ethanolic media and characterized by spectroscopic
methods. Using racemic tartaric acid for the synthesis, the simultaneous crystallization of racemic compounds (racemic phases)
and racemic conglomerates (chiral phases) has been observed. The X-ray crystal structure of (NH4)4V2O2(O2)2((2R,3R)–H2tart)2(μ–H2O)]V2O2(O2)2((2S,3S)–H2tart)2(μ–H2O)]·8H2O (tart = C4H2O6
4−) revealed that the dinuclear anion is composed of two pentagonal bipyramidal polyhedra about vanadium atoms, which are joined
to each other by sharing two oxygen atoms of hydroxyl groups and an oxygen atom from a bridging water ligand. The prepared
compounds are not stable in aqueous solution; 51V NMR spectra exhibit the signals of several peroxido and non-peroxido vanadium(V) complexes. |
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