1-Benzyl-3-(2-methoxy-phen-yl)imidazolium tetra-fluoro-borate.

In the title compound, C(17)H(17)N(2)O(+)·BF(4) (-), the central imidazolium ring makes dihedral angles of 74.58 (9) and 40.10 (6)° with the phenyl and 2-methoxy-phenyl rings, respectively. In the crystal, a strong π-π inter-action is observed between the imidazolium and 2-methoxy-phenyl rings, with a centroid-centroid distance of 3.5115 (15) Å. In addition, C-H⋯F and C-H⋯O hydrogen bonds and C-H⋯π inter-actions involving the -phenyl ring are observed.