Stefańska Anita, 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 Feb 28;65(Pt 3):o643. doi: 10.1107/S1600536809006783.
In the crystal structure of the title compound, C(7)H(3)ClN(4), neighbouring mol-ecules are linked via pairs of N-H⋯N hydrogen bonds into inversion dimers, thereby forming an R(2) (2)(12) ring motif. With respective average deviations from planarity of 0.009 (1) and 0.006 (1) Å, the pyrazine skeleton and the malononitrile fragment are oriented at an angle of 6.0 (1)° with respect to each other. The mean planes of the pyrazine ring lie either parallel or are inclined at an angle of 68.5 (1)° in the crystal structure.
在标题化合物C₇H₃ClN₄的晶体结构中，相邻分子通过N—H⋯N氢键对连接形成反演二聚体，从而形成R₂²(12)环 motif。吡嗪骨架和丙二腈片段相对于彼此的取向角度为6.0(1)°，各自与平面的平均偏差分别为0.009(1) Å和0.006(1) Å。在晶体结构中，吡嗪环的平均平面要么平行，要么倾斜68.5(1)°。
