C10H9BrN4O.H2O, M(r) = 299.13, monoclinic, C2/c, a = 21.938 (2), b = 16.003 (1), c = 6.847 (1) angstrom, beta = 98.32 (1)-degrees, V = 2378.5 angstrom 3, Z = 8, D(m) = 1.71, D(x) - 1.670 g cm-3, lambda(Mo K-alpha) = 0.71069 angstrom, mu = 33.57 cm-1, F(000) = 1200, room temperature, R = 0.053 for 1379 observed reflections. The X-ray diffraction study shows that the compound obtained in the cyclization of 5-cyano-6-(dicyanomethylene)-4-methyl-2-piperidone in HBr/dioxane is the title compound.
