title: 1,3-Bis(pyridin-2-yl)-1H-benzimidazol-3-ium tetra-fluoridoborate.
abstract: The asymmetric unit of the title compound, C(17)H(13)N(4) (+)·BF(4) (-), contains one half of the benzimidazolium cation and one half of the tetra-fluoridoborate anion, with crystallographic mirror planes bis-ecting the mol-ecules. One F atom of the tetra-fluoridoborate is equally disordered about a crystallographic mirror plane. In the crystal, C-H⋯F inter-actions link the cations and anions into layers parallel to (100). The crystal packing is further stabilized by F⋯π contacts involving the tetra-fluoridoborate anions and the five-membered rings [F⋯centroid = 2.811 (2) Å].
authors.affiliation: Institute of Inorganic Chemistry, University of Zürich, Winterthurerstrasse 190, 8057 Zürich,  Switzerland.
authors.forename: Gabriele
authors.initials: G
authors.lastname: Grieco
authors.forename: Olivier
authors.initials: O
authors.lastname: Blacque
authors.forename: Heinz
authors.initials: H
authors.lastname: Berke
references.citation: J Investig Med. 2001 Nov;49(6):522-33
references.pmid: 11730088
references.citation: Acta Crystallogr C. 2004 Mar;60(Pt 3):o215-6
references.pmid: 15004387
references.citation: Org Lett. 2007 Mar 29;9(7):1339-42
references.pmid: 17343392
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677