title: N-[(E)-4-Pyridylmethyl-ene]-4-[(E)-4-(4-pyridylmethyl-eneamino)benz-yl]aniline tetra-hydrate.
abstract: The title compound, C(25)H(20)N(4)·4H(2)O, crystallizes with the organic mol-ecule lying on a twofold rotation axis through the methyl-ene bridge C atom; there are also two water molecules in the asymmetric unit. The crystal structure is stabilized by C-H⋯O, O-H⋯O and O-H⋯N hydrogen bonds, linking the water mol-ecules to each other and to the pyridine N atom.
authors.affiliation: Key Laboratory of Pesticides and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China.
authors.forename: Sheng-Li
authors.initials: SL
authors.lastname: Hu
authors.forename: Yi-Tao
authors.initials: YT
authors.lastname: Li
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Cao