Daouda Ballo, Brelot Lydia, Doumbia Mouhamadou Lamine, Essassi El Mokhtar, Ng Seik Weng
Acta Crystallogr Sect E Struct Rep Online. 2011 May 1;67(Pt 5):o1235. doi: 10.1107/S1600536811014632. Epub 2011 Apr 29.
The asymmetric unit of the title compound, C(19)H(17)N(3)O(3), consists of two independent mol-ecules that are disposed about a pseudo-centre of inversion. The plane of the phenyl substituent is twisted by 38.1 (1)° [43.6 (1)° in the second mol-ecule] out of the plane of the quinoxaline ring system. The five-membered ring of the substituent at the 2-position adopts an envelope conformation; the 5-CH(2) atom representing the flap lies out of the plane defined by the other four atoms [deviation 0.264 (7) Å in the first mol-ecule and 0.291 (6) Å in the second]. The dihedral angle between the five-membered ring and the 4-phenyl ring is 84.9 (1)° while that between the five-membered ring and the 5-phenyl ring is 65.6 (1)°.
标题化合物C(19)H(17)N(3)O(3)的不对称单元由两个独立的分子组成，它们围绕一个假对称中心排列。苯基取代基的平面与喹喔啉环系统的平面扭转了38.1 (1)° [第二个分子中为43.6 (1)°]。2-位取代基的五元环呈信封构象；代表翼片的5-CH(2)原子位于由其他四个原子定义的平面之外 [第一个分子中的偏差为0.264 (7) Å，第二个分子中的偏差为0.291 (6) Å]。五元环与4-苯基环之间的二面角为84.9 (1)°，而五元环与5-苯基环之间的二面角为65.6 (1)°。
