N-{(E)-[4-(Dimethylamino)phenyl]- methylidene}-2,3-dimethylaniline Muhammad Sarfraz, a Muhammad Ilyas Tariq a and M. Nawaz Tahir b * a Department of Chemistry, University of Sargodha, Sargodha, Pakistan, and b Department of Physics, University of Sargodha, Sargodha, Pakistan Correspondence e-mail: dmntahir_uos@yahoo.com Received 11 July 2010; accepted 13 July 2010 Key indicators: single-crystal X-ray study; T = 296 K; mean (C–C) = 0.004 A ˚ ; R factor = 0.065; wR factor = 0.188; data-to-parameter ratio = 14.6. There are two independent molecules in the asymmetric unit of the title compound, C 17 H 20 N 2 , in which the dihedral angles between the aromatic rings are 30.34 (11) and 41.44 (8)  . In the crystal, weak C—H interactions may help to establish the packing. Related literature For related structures, see: Hussain et al. (2010); Tahir et al. (2010a,b); Tariq et al. (2010). Experimental Crystal data C 17 H 20 N 2 M r = 252.35 Triclinic, P 1 a = 7.6556 (8) A ˚ b = 7.7296 (8) A ˚ c = 25.059 (3) A ˚  = 93.843 (6)   = 95.436 (6)   = 97.431 (5)  V = 1459.1 (3) A ˚ 3 Z =4 Mo K radiation  = 0.07 mm 1 T = 296 K 0.28  0.18  0.16 mm Data collection Bruker Kappa APEXII CCD diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2005) T min = 0.982, T max = 0.988 20871 measured reflections 5142 independent reflections 2482 reflections with I >2(I) R int = 0.075 Refinement R[F 2 >2(F 2 )] = 0.065 wR(F 2 ) = 0.188 S = 1.02 5142 reflections 352 parameters H-atom parameters constrained Á max = 0.49 e A ˚ 3 Á min = 0.50 e A ˚ 3 Table 1 Hydrogen-bond geometry (A ˚ ,  ). Cg1, Cg2 and Cg4 are the centroids of the C1–C6, C10–C15 and C27–C32 benzene rings, respectively. D—HA D—H HA DA D—HA C7—H7ACg1 i 0.96 2.90 3.756 (3) 149 C16—H16CCg4 ii 0.96 2.69 3.434 (4) 135 C32—H32Cg2 iii 0.93 2.88 3.698 (3) 148 Symmetry codes: (i) x þ 1; y; z þ 1; (ii) x þ 1; y  1; z; (iii) x; y þ 1; z. Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON. The authors acknowledge the provision of funds for the purchase of diffractometer and encouragement by Dr Muhammad Akram Chaudhary, Vice Chancellor, University of Sargodha, Pakistan. Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB5549). References Bruker (2005). SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Bruker (2009). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837–838. Hussain, A., Tahir, M. N., Tariq, M. I., Ahmad, S. & Asiri, A. M. (2010). Acta Cryst. E66, o1953. Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Spek, A. L. (2009). Acta Cryst. D65, 148–155. Tahir, M. N., Tariq, M. I., Ahmad, S., Sarfraz, M. & Ather, A. Q. (2010a). Acta Cryst. E66, o1562. Tahir, M. N., Tariq, M. I., Ahmad, S., Sarfraz, M. & Ather, A. Q. (2010b). Acta Cryst. E66, o1817. Tariq, M. I., Ahmad, S., Tahir,M. N., Sarfaraz, M. & Hussain, I. (2010). Acta Cryst. E66, o1561. organic compounds Acta Cryst. (2010). E66, o2055 doi:10.1107/S1600536810027832 Sarfraz et al. o2055 Acta Crystallographica Section E Structure Reports Online ISSN 1600-5368