Received 19 August 2013
The title compound, C22H26N2O2, crystallizes with three independent molecules, two of which are situated on inversion centers, so the asymmetric unit contains two independent half-molecules and one molecule in a general position. The two hydroxy groups in each molecule are involved in intramolecular O-HN hydrogen bonds, which generate S(6) rings. In the crystal, weak intermolecular C-H interactions link the molecules into two crystallographically independent columns propagating along ; one column consists of molecules in general positions, while the other column is built from alternating independent centrosymmetric molecules.
For applications of Schiff base ligands in coordination chemistry, see: Gao & Zheng (2002); Hamil et al. (2012); Chu et al. (2008); More et al. (2001); Vigato & Tamburini (2004). For details of the synthesis, see: Huang et al. (2008).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT-Plus (Bruker, 2004); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CV5426 ).
The authors acknowledge the Department of Chemistry, IIT Madras, for the data collection.
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