Acta Cryst. (2008). E64, o1720-o1721  [ doi:10.1107/S1600536808024872 ]

3-(2-Chloro-6-fluorophenyl)-1-(2-thienyl)prop-2-en-1-one

H.-K. Fun, S. Chantrapromma, P. S. Patil and S. M. Dharmaprakash

Abstract: The title chalcone derivative, C₁₃H₈ClFOS, crystallized as an inversion twin with two independent molecules in the asymmetric unit. The thiophene rings in both molecules are disordered over two sites: the ratios of occupancies for the major and minor components in the two molecules are 0.820 (2):0.180 (2) and 0.853 (2):0.147 (2). The dihedral angles between the major and minor components of the thiophene and benzene rings are 1.13 (18) and 2.2 (6)°, respectively, in one molecule, with corresponding values 6.09 (17) and 1.3 (6)° in the other. Weak intramolecular C-HO and C-HF interactions involving the prop-2-en-1-one group generate an S(5)S(5) ring motif, whereas a weak intramolecular C-HCl contact generates an S(6) ring motif. In the crystal structure, molecules of both the major and minor components are linked into infinite one-dimensional chains along the b axis. The crystal structure is stabilized by weak C-HO, C-HF, C-HCl and C-H interactions.

Online 9 August 2008

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