Acta Cryst. (2014). E70, o97-o98 [ doi:10.1107/S1600536813034107 ]
Abstract: The asymmetric unit of the title compound, C26H25ClN2O3, contains two independent molecules (A and B). The conformation of the two molecules differs essentially in the dihedral angle involving the two benzene rings. They are inclined to one another by 52.47 (10) in A and by 31.75 (11)° in B. In both molecules, the six-membered piperidin-3-one rings have chair conformations. In molecule A, all four five-membered rings have twist conformations. In molecule B, only three of the four five-membered rings have twist conformations. The fourth, of the inden-1-one moiety, has an envelope conformation with the spiro C atom, bonded to the N atom of the pyrrolidine ring, as the flap. A weak intramolecular O-HN hydrogen bond occurs in each independent molecule while a C-HO interaction is also observed in molecule A. In the crystal, pairs of O-HO hydrogen bonds link the molecules, forming inversion dimers with graph-set motif R22(12). These dimers are further interconnected by C-HO and C-H interactions, forming a three-dimensional network.
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