Hl. Debondt et al., STRUCTURE OF 4(5)-NITROIMIDAZOLE AT 100-K, Acta crystallographica. Section C, Crystal structure communications, 49, 1993, pp. 693-695
4(5)-Nitroimidazole, C3H3N3O2, M(r) = 113.08, monoclinic, P2(1)/n, a =
6.9559 (4), b = 9.9130 (6), c = 7.3045(4) angstrom, beta = 119.41(4)d
egrees, V= 438.8 (4) angstrom3, Z = 4, D(m)(293 K) = 1.64, D(x) = 1.71
17 Mg m-3, lambda(Mo Kalpha) = 0.71069 angstrom, mu = 0.1367 mm-1, F(0
00) = 232, T = 100 K. Final R = 0.024 for 633 unique observed [F great
er-than-or-equal-to 4sigma(F)] reflections. The molecules are planar a
nd are stacked in planes almost parallel to the bc plane. These molecu
lar layers are built up by three hydrogen bonds. 4-5-tautomerism is di
scussed.