Methylmercury and dimethylthallium complexes of 5-(4′-dimethylaminobenzylidene)-2-thiohydantoin (HDABTd): The crystal and molecular structures of HDABTd and [TlMe2(DABTd)(DMSO)] |
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Authors: | Jos S Casas Alfonso Castieiras Nuria Play Agustn Snchez Jos Sordo Jos Ma Varela Ezequiel M Vzquez-Lpez |
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Institution: | a Departamento de Química Inorgánica, Universidade de Santiago de Compostela, 15706 Santiago de Compostela, Galicia, Spain b Departamento de Química Inorgánica, Universidade de Vigo, 36200 Vigo, Galicia, Spain |
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Abstract: | The ligand 5-(4′-dimethylaminobenzylidene)-2-thiohydantoin (HDABTd) was prepared and its structure determined by X-ray diffraction. In the crystal, ligand molecules are linked in chains along the 110] direction by intermolecular N(3)–H(3)O(1)I and N(1)–H(1)Sii hydrogen bonds. The complexes HgMe(DABTd)] and TlMe2(DABTd)] were prepared by reaction of the ligand with methylmercury acetate or dimethylthallium hydroxide, and were characterized in the solid state by IR spectroscopy and in solution by conductivity measurements and 1H, 13C, 199Hg and 205Tl NMR spectroscopy. The dimethylthallium complex crystallized in DMSO solution as TlMe2(DABTd)(DMSO)], an X-ray diffraction study of which showed its thallium atoms to be coordinated to the two methyl C atoms, the oxygen atom of a DMSO molecule, the S and N(1) atoms of one DABTd ligand and, more weakly, to the oxygen atom of a neighbouring DABTd. This last interaction links the molecules of the complex in chains parallel to the b axis. Crystals of the methylmercury(II) complex contain three HgMe(DABTd)]·DMSO structures per asymmetric unit, but poor data quality prevented complete refinement. |
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Keywords: | Methylmercury and dimethylthallium complexes Crystal structure NMR (multiprobe) spectroscopy |
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