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The title chalcone derivative, C(13)H(8)ClFOS, crystallized as an inversion twin with two independent mol-ecules in the asymmetric unit. The thio-phene rings in both mol-ecules are disordered over two sites: the ratios of occupancies for the major and minor components in the two mol-ecules 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 thio-phene and benzene rings are 1.13 (18) and 2.2 (6)°, respectively, in one mol-ecule, with corresponding values 6.09 (17) and 1.3 (6)° in the other. Weak intra-molecular C-H⋯O and C-H⋯F inter-actions involving the prop-2-en-1-one group generate an S(5)S(5) ring motif, whereas a weak intra-molecular C-H⋯Cl contact generates an S(6) ring motif. In the crystal structure, mol-ecules 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-H⋯O, C-H⋯F, C-H⋯Cl and C-H⋯π inter-actions.

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