title: 5,10-dihydroxy-5H,10H-diimidazo[1,2-a:1',2'-d]pyrazine.
abstract: Crystallization of the title compound, C8H8N4O2, results in the formation of one-dimensional chains of imidazole (im) molecules linked together by strong hydrogen bonds. The O...N(im) separation and O-H(...N) distance are 2.6906 (17) and 1.74 (2) A, respectively, and the O-H...N angle is 173 (2) degrees. The one-dimensional chains are weakly pi stacked along the b axis, with centroid-to-centroid separations of 3.678 (2) A between five- and six-membered rings and 3.963 (2) A between six-membered rings. Each molecule is arranged around an inversion center.
authors.affiliation: Department of Chemistry, University of Louisville, KY 40292, USA.
authors.forename: Lionel E
authors.initials: LE
authors.lastname: Cheruzel
authors.forename: Mark S
authors.initials: MS
authors.lastname: Mashuta
authors.forename: Robert M
authors.initials: RM
authors.lastname: Buchanan