Synthesis and structure of dithizonato complexes of antimony(III), copper(II) and tin(IV)
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Date
Authors
Chiweshe, T.T.
Landman, Marile
Conradie, Jeanet
Von Eschwege, Karel G.
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis
Abstract
In view of the important role of dithizone in trace metal analyses, new structural aspects and approaches used to probe metal complexes of dithizone are of interest. Three X-ray diffraction structures are reported, dichloro-bis(dithizonato)tin(IV), dichloro-(dithizonato)antimony(III) and bis(dithizonato)copper(II). During synthesis of the tin complex, autooxidationof SnIICl2 to SnIV occurred without chloride liberation. The SbIII complex revealed a unique distorted seesaw geometry which is, as for the other complexes, conveniently explained by DFT calculated molecular orbital orientations. Computed lowest reaction energies are in agreement with experimentally obtained reaction products, which, together with molecular orbital renderings serve as a suitable tool towards the prediction of modes of coordination in these complexes. The S-M-N bond angle in the 5-membered coordination ring shows a linear relationship with the corresponding metal ionic radii.
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Keywords
Crystal, Dithizone, Tin, Copper, Antimony, DFT, Orbitals, Ionic radius
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Citation
Trevor T. Chiweshe, Marilé Landman, Jeanet Conradie & Karel G. Von Eschwege (2016) Synthesis and structure of dithizonato complexes of antimony(III), copper(II) and tin(IV), Journal of Coordination Chemistry, 69:5, 788-800, DOI: 10.1080/00958972.2016.1145213.