da Silva Lima Camilo H, de Souza Marcus V N, Wardell Solange M S V, Wardell James L, Tiekink Edward R T
Acta Crystallogr Sect E Struct Rep Online. 2010 Oct 23;66(Pt 11):o2886-7. doi: 10.1107/S1600536810041656.
In the title mol-ecule, C(7)H(8)ClN(3)O, the pyrazine and amide groups are almost co-planar [N-C-C-N torsion angle = -2.4 (2) °], a conformation stabilized by an intra-molecular N-H⋯N hydrogen bond. The chloro-ethyl group lies out of the plane [N-C-C-Cl = -65.06 (17) °]. In the crystal, the presence of N-H⋯N hydrogen bonds leads to the formation of a C(6) supra-molecular chain along the b axis. The carbonyl-O atom accepts two C-H⋯O inter-actions. These, plus Cl⋯Cl short contacts [3.3653 (6) Å], consolidate the packing of the chains in the crystal.
在标题分子C(7)H(8)ClN(3)O中，吡嗪基和酰胺基几乎共平面[N-C-C-N扭转角 = -2.4 (2)°]，这种构象通过分子内N-H⋯N氢键得以稳定。氯乙基位于平面之外[N-C-C-Cl = -65.06 (17)°]。在晶体中，N-H⋯N氢键的存在导致沿b轴形成C(6)超分子链。羰基-O原子接受两个C-H⋯O相互作用。这些相互作用，加上Cl⋯Cl短接触[3.3653 (6) Å]，巩固了晶体中链的堆积。
