Stefańska Anita, Zarzeczańska Dorota, Ossowski Tadeusz, Sikorski Artur
University of Gdańsk, Faculty of Chemistry, Sobieskiego 18/19, 80-952 Gdańsk, Poland.
Acta Crystallogr Sect E Struct Rep Online. 2009 Mar 14;65(Pt 4):o772-3. doi: 10.1107/S1600536809008939.
In the crystal structure of the title compound, C(11)H(6)N(4), neighbouring mol-ecules are linked into inversion dimers through pairs of weak C-H⋯N hydrogen bonds, forming an R(2) (2)(10) ring motif. The dimers forming this motif are further linked by π-π inter-actions. With respective average deviations from planarity of 0.004 (2) and 0.004 (1) Å, the pyrazino[2,3-β]indolizine and cyano fragment are oriented at 0.8 (1)° to each other. The mean planes of the pyrazino[2,3-b]indolizine skeleton either lie parallel or are inclined at an angle of 28.7 (2)° in the crystal.
在标题化合物C(11)H(6)N(4)的晶体结构中，相邻分子通过成对的弱C-H⋯N氢键连接成反向二聚体，形成R(2) (2)(10)环 motif。形成此motif的二聚体通过π-π相互作用进一步连接。吡嗪并[2,3-β]中氮茚和氰基片段的平均平面偏离度分别为0.004 (2) 和0.004 (1) Å，它们相互间的夹角为0.8 (1)°。在晶体中，吡嗪并[2,3-b]中氮茚骨架的平均平面要么平行，要么倾斜28.7 (2)°。
