Received 23 November 2011
aState Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China, and bSchool of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China
Correspondence e-mail: email@example.com
There are two molecules in the asymmetric unit of the title compound, C19H22N2O. Both molecules have an E conformation about their C=N bonds and both piperdine rings adopt chair conformations with their N atoms adopting pyramidal geometries [bond angle sums = 329.8 (4) and 330.2 (4)°]. Both molecules feature an intramolecular O-HN hydrogen bond, which generates an S(6) ring. The dihedral angles between the phenyl and benzene ring planes are 45.97 (18) and 66.0 (2)°. Short O-HO contacts occur in the crystal.
Data collection: CAD-4 Software (Enraf-Nonius, 1989); cell refinement: CAD-4 Software; data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB6532 ).
We are grateful to the China Postdoctoral Science Foundation (20110491380) and the Fundamental Research Funds for the Central Universities (ZYGX2009J085) for support.
Enraf-Nonius (1989). CAD-4 Software. Enraf-Nonius, Delft, The Netherlands.
Harms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.
North, A. C. T., Phillips, D. C. & Mathews, F. S. (1968). Acta Cryst. A24, 351-359.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Stilinovic, V., Cincic, D. & Kaitner, B. (2008). Acta. Chim. Solv. 55, 874-879.