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Supramolecular architecture in the crystals of polyfluorinated homophthalic acids |
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| Authors: | T V Rybalova Yu V Gatilov Ya V Zonov V M Karpov |
| Institution: | (1) N. N. Vorozhtsov Institute of Organic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russia |
| Abstract: | X-ray diffraction analysis of four perfluorinated homophthalic (2-carboxymethylbenzoic) acids is carried out. In the crystals of 2-carboxymethyl-3,4,5,6-tetrafluorobenzoic acid (1) the chains (1D architecture) form with the usual dimeric carboxylic C(O)OH |
| Keywords: | polyfluorinated 2-(carboxymethyl)benzoic (homophthalic acids) crystal structure hydrogen bonding C-F π and H-O π interactions supramolecular synthon |
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2) and 2-(1-carboxy-2,2,2-trifluoroethyl)-3,4,5,6-tetrafluorobenzoic acids (3) the layers (2D architecture) with dimeric and chain-like synthons C(O)OH...O(HO)C are found. In the crystals of 2-methoxycarbonyl(difluoromethyl)]-3,4,5,6-tetrafluorobenzoic acid (4) only dimers (0D architecture) form with the chain synthon that incorporates both an ester and a carboxylic group. In the crystals of 1 and 2 intermolecular H-O...π interactions, in the crystals of 4 C-F...π interactions, and in 3 both types of interactions are observed.