title: [μ-Bis(5,7-dimethyl-1,8-naphthyridin-2-yl)diazene]bis-[difluoridoboron(III)].
abstract: In the title compound, C(20)H(18)B(2)F(4)N(6), the bis-(5,7-dimethyl-1,8-naphthyridin-2-yl)diazene molecule is bis-ected by a symmetry centre midway between the central N atoms of the diazene group. Each of the symmetry-related halves of the molecule binds to a B atom through an N,N'-bite. Two terminal F ions complete the distorted BN(2)F(2) tetra-hedral geometry around each B atom. The BF(2) plane is almost perpendicular to the boron-naphthyridine ring plane, with a dihedral angle of 87.8 (2)°. The main inter-actions in the crystal structure are some C-H⋯F hydrogen bonds and π-π contacts between 1,8-naphthyridine rings [centroid-centroid distance = 4.005 (1) Å].
authors.affiliation: College of Animal Husbandry and Veterinary Studies, Henan Agricultural University, Zhengzhou, Henan Province 450002, People's Republic of China.
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Li
authors.forename: Juan
authors.initials: J
authors.lastname: Mo
authors.forename: Li
authors.initials: L
authors.lastname: Yuan
authors.forename: Jian-Hua
authors.initials: JH
authors.lastname: Liu
authors.forename: Su-Mei
authors.initials: SM
authors.lastname: Zhang