Xuefang Shi, Li Wu, Zhi-Yong Xing
2006
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0
Influential Citations
6
Citations
Journal
Acta Crystallographica Section E-structure Reports Online
Abstract
The title compound (pyrazine-2-carboxylic acid), C5H4N2O2, had been previously characterized in space group Pna21 and has now been obtained as a monoclinic polymorph crystallizing in space group P21. The molecule is almost planar and is connected to symmetry-related molecules through O—H⋯N and C—H⋯O hydrogen bonds, and weak π–π interactions, giving a three-dimensional network.