Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 5 (May 2013)

organic compounds

Acta Cryst. (2013). E69, o639-o640    [ doi:10.1107/S1600536813008258 ]


B. F. Abdel-Wahab, E. Abdel-Latif, S. W. Ng and E. R. T. Tiekink

Abstract: Two independent mol­ecules comprise the asymmetric unit of the title compound, C24H26N4O. The major difference between them is found in the relative orientation of the triazole-bound p-tolyl group which have the opposite sense of twist [N-N-C-C torsion angles = 55.8 (3) and -49.8 (3)°]. The chalcone residue is almost coplanar with the triazole ring [N-C-C-O and C-C-C-C torsion angles = -178.9 (2) and -178.5 (2)°, respectively; cf. 177.9 (3) and 168.5 (3)°, respectively, in the second mol­ecule]. The conformation about each C=C double bond is E and in each case the triazole methyl group is syn to the carbonyl O atom. In the crystal, mol­ecules aggregate into layers parallel to (-113). The first independent mol­ecule self-associates into a layer via C-H...O and C-H...[pi] inter­actions. By contrast, layers comprising the second independent mol­ecule do not feature specific inter­actions between mol­ecules. The global crystal packing comprises alternating layers.

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