Fathimunnisa M, Manikandan H, Selvanayagam S, Sridhar B
Department of Chemistry, Faculty of Science, Annamalai University, Annamalainagar 608 002, India.
Department of Physics, Kings College of Engineering, Punalkulam 613 303, India.
Acta Crystallogr E Crystallogr Commun. 2015 Jul 11;71(Pt 8):915-8. doi: 10.1107/S2056989015012931. eCollection 2015 Aug 1.
In the title pyrrolizidine derivative, C33H26F2N2O2, both pyrrolidine rings of the pyrrolizidine moiety adopt an envelope conformation. The di-fluoro-phenyl group is oriented at an angle of 54.3 (1)° with respect to the oxindole moiety. The crystal packing features an N-H⋯O hydrogen bond, which forms an R 2 (2)(8) motif, and a C-H⋯O inter-action, which generates a C(8) chain along [010]. In addition, this chain structure is stabilized by C-H⋯π inter-actions. In one of the pyrrolidine rings, the methyl-ene group forming the flap of an envelope and the H atoms of the adjacent methyl-ene groups are disordered over two sets of sites, with site-occupancy factors of 0.571 (4) and 0.429 (4).
在标题吡咯里西啶衍生物C33H26F2N2O2中，吡咯里西啶部分的两个吡咯烷环均呈信封式构象。二氟苯基相对于吲哚酮部分的取向角度为54.3 (1)°。晶体堆积具有形成R 2 (2)(8)基序的N-H⋯O氢键和沿[010]方向生成C(8)链的C-H⋯O相互作用。此外，这种链结构通过C-H⋯π相互作用得以稳定。在其中一个吡咯烷环中，形成信封式瓣的亚甲基以及相邻亚甲基的H原子在两组位置上无序排列，占位因子分别为0.571 (4)和0.429 (4)。
