Dobson A J, Gerkin R E
Department of Chemistry, Ohio State University, Columbus 43210, USA.
Acta Crystallogr C. 1996 Jun 15;52 ( Pt 6):1512-4. doi: 10.1107/s0108270195016416.
3-Aminopyrazine-2-carboxylic acid, C5H5N3O2, displays an extensive network of intra- and intermolecular hydrogen bonds which are undoubtedly responsible for the modest values of the displacement parameters. H-atom transfer to the ring N atoms did not occur and the carboxy and amino H atoms are ordered. The virtually planar molecules lie very nearly in planes parallel to (102) and are stacked along the a direction with separations of 3.324 (2) A indicating pi-pi interactions.
3-氨基吡嗪-2-羧酸（C₅H₅N₃O₂）呈现出广泛的分子内和分子间氢键网络，这无疑是位移参数值适中的原因。氢原子未转移至环氮原子，羧基氢原子和氨基氢原子呈有序排列。这些近乎平面的分子几乎位于平行于(102)的平面内，并沿a方向堆积，间距为3.324(2) Å，表明存在π-π相互作用。
