STRUCTURE OF N,N'-DIMETHYL-4,4'-BIPYRIDYLIUM DICHLORIDE DIHYDRATE

C12H14N22+.2Cl-.2H2O, M(r) = 293, triclinic, P1BAR, a = 9.696 (3), b = 11.322 (4), c = 7.076 (3) angstrom, alpha = 100.68 (4), beta = 93.40 (3), gamma = 107.04 (4)degrees, V = 724 (6) angstrom3, Z = 2, D(x) = 1.344 Mg m-3, lambda(Cu Kalpha) = 1.5418 angstrom, mu = 4.4 mm-1, F(000) = 308, room temperature, R = 0.052 for 2201 independent reflections. N,N'-dimethyl-4,4'-bipyridylium dichloride (or paraquat, viologen) like mitoguazone (an anticancer drug), affects the polyamine uptake systems, a potential target in cancer chemotherapy. The description of the three-dimensional structure of this ion should allow a better assessment of the structure-activity relationship of these bioactive molecules.