Synchrotron radiation was used to study the structure of the title compound, C20H19BrN2O3·C 3H7NO, which was obtained as fine fragile needle-shaped crystals by recrystallization from dimethyl-formamide (DMF), one mol-ecule of which is incorporated per asymmetric unit into the crystal. The compound adopts a compact closed conformation with the orientation of the benzyl group such that the aryl ring is positioned over the piperazinedione ring, resulting in a Cspiro⋯Ctrans-C-CPh pseudo-torsion angle of-3.3 (3)°. The five-membered ring is present in an expected envelope conformation and the six-membered piperazinedione ring adopts a less puckered boat-like conformation. Reciprocal amide-to-amide hydrogen bonding between adjacent piperazinedione rings and C-H⋯O inter-actions involving DMF mol-ecules propagate in the crystal as a thick ribbon in the a-axis direction.
|Original language||English (US)|
|Journal||Acta Crystallographica Section C: Crystal Structure Communications|
|State||Published - Jun 11 2010|
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)