Received 24 April 2013
aDepartment of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand,bDepartment of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand,cFaculty of Traditional Thai Medicine, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand,dX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and eDepartment of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, PO Box 2457, Riyadh 11451, Saudi Arabia
Correspondence e-mail: firstname.lastname@example.org
The molecule of the title compound, C15H15NO2, adopts a trans conformation with respect to the methylidene C=N bond and is twisted with a dihedral angle of 26.31 (5)° between the two substituted benzene rings. The ethoxy group is almost coplanar with the bound benzene ring with a C-O-C-C torsion angle of -179.08 (9)°. In the crystal, molecules are linked by O-HN hydrogen bonds and weak C-HO interactions into chains propagating in the  and [01-1] directions. C-H interactions are also present.
For standard bond lengths, see: Allen et al. (1987). For background to and applications of aza-stilbene, see: Cheng et al. (2010); da Silva et al. (2011); Kabir et al. (2008); Lu et al. (2012); Pavan et al. (2011). For related structures, see: Sun et al. (2011); Wang (2009).
Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; 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 and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: RZ5061 ).
NK thanks the Center of Excellence for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education, and the Graduate School, Prince of Songkla University, for financial support. The authors extend their appreciation to the Malaysian Government and Universiti Sains Malaysia for APEX DE2012 grant No. 1002/PFIZIK/910323, and the Deanship of Scientific Research and the Research Center, College of Pharmacy, King Saud University.
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