Acta Cryst. (2013). E69, o185 [ doi:10.1107/S1600536812051690 ]
Abstract: In the title compound, C18H18F2N2O3S, the piperazine ring adopts a chair conformation. The dihedral angle between the sulfonyl-bound benzene ring and the best fit plane throught the six non-H atoms of the piperazine ring is 69.4 (2)°, while those between the fluorobenzene and sulfonyl rings and the fluorobenzene and piperazine rings are 30.97 (2) and 75.98 (2)°, respectively. In the crystal, molecules are connected to form a tetrameric unit through C-HO hydrogen bonds. The structure is further stabilized by weak intermolecular C-HF interactions, generating C(8) and C(7) chains running along .
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