Acta Cryst. (2013). E69, o1059 [ doi:10.1107/S1600536813015237 ]
Abstract: The asymmetric unit of the title compound, C23H30N2O2, contains one half-molecule, with a twofold axis splitting the molecule in two identical halves. The structure of the racemic mixture has been reported previously [Rivera et al. (2009) J. Chem. Crystallogr. 39, 827-830] but the enantiomer reported here crystallized in the orthorhombic space group P21212 (Z = 2), whereas the racemate occurs in the triclinic space group P-1 (Z = 2). The observed molecular conformation is stabilized by two intramolecular O-HN hydrogen bonds, which generate rings with graph-set motif S(6). In the crystal, molecules are linked via non-classical C-HO interactions, which stack the molecules along the b axis.
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