Received 11 July 2008
The title compound, C20H19NO, was prepared from 2,6-lutidine and benzophenone. There are two symmetry-independent molecules in the asymmetric unit. Each molecule is involved in one intramolecular O-HN hydrogen bond. In the crystal structure, helical chains are formed along the b axis by weak - interactions between neighbouring molecules [centroid-centroid distances between the pyridyl rings of the two independent molecules = 4.041 (3) and 4.051 (3) Å].
Data collection: SMART (Bruker, 2000); cell refinement: SMART; data reduction: SAINT (Bruker, 2000); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IM2078 ).
We thank the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (grant No. 07KJD150101) for financial support.
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