5,6-Dimethyl­pyrazine-2,3-dicarb­oxy­lic acid

The asymmetric unit of the title compound, C(8)H(8)N(2)O(4), consists of one complete mol­ecule and a second mol­ecule generated by the application of twofold axis. The mean planes of the two carboxyl groups attached to the pyrazine ring at neighboring positions are twisted by 10.8 (1) and 87.9 (1)°...

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Detalles Bibliográficos
Autor principal: Liu, Fu-Hong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2011
Materias:
Organic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3254478/
https://www.ncbi.nlm.nih.gov/pubmed/22259420
http://dx.doi.org/10.1107/S1600536811052366
Descripción
Sumario:The asymmetric unit of the title compound, C(8)H(8)N(2)O(4), consists of one complete mol­ecule and a second mol­ecule generated by the application of twofold axis. The mean planes of the two carboxyl groups attached to the pyrazine ring at neighboring positions are twisted by 10.8 (1) and 87.9 (1)° in the complete molecule and 43.0 (1)° in the symmetry-generated molecule. The crystal packing features O—H⋯N hydrogen bonds, which link the mol­ecules into layers along [101].

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