On the influence of the heterocyclic ring substituents on the structure of dimethylthallium pyrimidine-2-thionato complexes. Crystal structure of dimethyl-(4-trifluoromethylpyrimidine-2-thionate)thallium(III): a compound with intermolecular C–H ⋯ π interactions

Add time:08/14/2019    Source:sciencedirect.com

The complex [Me2Tl(4-CF3pymS)] has been prepared by reacting 4-trifluoromethylpyrimidine-2-thione (4-CF3pymSH) with dimethylthallium(III) hydroxide in methanol. The resulting compound has a polymeric chain structure, with the thallium atom coordinated by two nitrogen and two sulfur atoms from two different ligands, which act as bridges between two metal atoms, as well as by two carbon atoms of the methyl groups. An intermolecular C–H ⋯ π interaction is observed between an H atom of each methyl group and one of the pyrimidine rings of the neighbouring chain. The structure of the complex is discussed in terms of the IR absorptions, the 1H, 13C and 205Tl NMR spectra and FAB data.

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