title: Tetra-kis(1,3,4,6,7,9-hexa-aza-1H-phen-alen-6-ium) sodium(I) penta-kis(tetra-fluorido-borate).
abstract: In the title compound, Na(+)·4C(7)H(5)N(6) (+)·5BF(4) (-), the Na(+) ion lies on a fourfold rotation axis and one of the tetra-fluoridoborate ions lies on a site of symmetry . Each Na(+) ion is surrounded by four symmetry-related tetra-fluoridoborate ions, and is eight-coordinated by F atoms, the Na⋯F separation being 2.3956 (15) or 2.4347 (17) Å. The hexa-azaphenalenium ring system is essentially planar. In the crystal structure, the cations and anions are linked into a three-dimensional network by N-H⋯N and C-H⋯F hydrogen bonds.
authors.affiliation: Key Laboratoy for Functional Polymer Materials and Center for Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, Weijin Road No. 94, Tianjin, People's Republic of China.
authors.forename: Yuqin
authors.initials: Y
authors.lastname: Jiang
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Hou
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Chen