title: 1,1',2,2'-Tetra-methyl-3,3'-(p-phenyl-enedimethyl-ene)diimidazol-1-ium bis-(tetra-fluoridoborate).
abstract: The title imidazolium-based ionic-liquid salt, C(18)H(24)N(4) (2+)·2BF(4) (-), has the cation lying about a center of inversion. The five-membered imidazole ring is approximately perpendicular to the six-membered phenyl-ene ring [dihedral angle = 86.9 (1)°]. The tetra-fluoro-borate anion is disordered over two sites in a 0.722 (3):0.278 (3) ratio.
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Subramaniam
authors.initials: S
authors.lastname: Puvaneswary
authors.forename: Yatimah
authors.initials: Y
authors.lastname: Alias
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng