title: 2,2'-[p-Phenyl-enebis(methyl-idene-aza-ne-di-yl)]dipyridinium bis-(hydrogensulfate) dihydrate.
abstract: The cation of the title salt, C(18)H(20)N(4) (2+)·2HSO(4) (-)·2H(2)O, lies on a center of inversion with the mid-point directly in the middle of the p-phenyl-ene ring. Within the hydrogensulfate ion, the S-O(H) bond is the longest of the S-O bonds. The dihedral angle between the central and terminal ring of the cation is 78.6 (2)°. In the crystal, the cation, anion and water mol-ecule inter-act by O-H⋯O and N-H⋯O hydrogen bonds, generating a three-dimensional network.
authors: Shan
authors: S
authors: Gao
authors: Xiao-Juan
authors: XJ
authors: Qi
authors: Li-Li
authors: LL
authors: Kong
authors: Seik Weng
authors: SW
authors: Ng
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677