5,6-Dimethyl-pyrazine-2,3-dicarb-oxy-lic acid.

ABSTRACT: The asymmetric unit of the title compound, C(8)H(8)N(2)O(4), consists of one complete mol-ecule and a second mol-ecule 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 mol-ecules into layers along [101].

SUBMITTER: Liu FH 

PROVIDER: S-EPMC3254478 | biostudies-literature | 2012 Jan

REPOSITORIES: biostudies-literature