title: 2,2'-Dimethyl-7,7'-(methyl-enediimino)di-1,8-naphthyridin-1-ium bis-(perchlorate).
abstract: In the title salt, C(19)H(20)N(6) (2+)·2ClO(4) (-), the two planar 1,8-naphthyridine systems are linked by a methyl-enediamine group with a dihedral angle of 60.6 (1)° between the two systems. The crystal structure involves extensive N-H⋯O and C-H⋯O hydrogen bonding.
authors.affiliation: College of Animal Husbandry and Veterinary Studies, Henan Agricultural University, Zhengzhou, Henan Province 450002, People's Republic of China.
authors.forename: Juan
authors.initials: J
authors.lastname: Mo
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Liu
authors.forename: Yu-Shan
authors.initials: YS
authors.lastname: Pan
authors.forename: Su-Mei
authors.initials: SM
authors.lastname: Zhang
authors.forename: Xiang-Dang
authors.initials: XD
authors.lastname: Du