article · Acta Crystallographica Section E Crystallographic Communications
The structure of the title compound, C<sub>23</sub>H<sub>21</sub>BrN<sub>4</sub>O, contains two independent mol-ecules connected by hydrogen bonds of the type N<sub>amide</sub>-H⋯N≡C to form a dimer. The configuration at the exocyclic C=C double bond is <i>E</i>. The mol-ecules are roughly planar except for the isopropyl groups. There are minor differences in the orientations of these groups and the phenyl rings at N1. The dimers are further linked by 'weak' hydrogen bonds, two each of the types H<sub>phen-yl</sub>⋯O=C (H⋯O = 2.50, 2.51 Å) and H<sub>phen-yl</sub>⋯Br (H⋯Br = 2.89, 2.91 Å), to form ribbons parallel to the <i>b</i> and <i>c</i> axes, respectively. The studied crystal was a non-merohedral twin.
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DOI: 10.1107/s2056989024003086
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