(Meth­oxy­methyl­idene)di­methyl­aza­nium tetra­phenyl­borate aceto­nitrile monosolvate

In the cation of the title salt, C(4)H(10)NO(+)·C(24)H(20)B(−)·C(2)H(3)N, the C—N bond lengths are 1.2864 (16), 1.4651 (17) and 1.4686 (16) Å, indicating double- and single-bond character, respectively. The C—O bond length of 1.2978 (15) Å shows double-bond character, pointing towards charge delocalization within the NCO plane of the iminium ion. C—H⋯π inter­actions are present between the methine H atom and two of the phenyl rings of the tetra­phenyl­borate ion. The latter forms an aromatic pocket in which the cation is embedded. The iminium ion is further connected through a C—H⋯N hydrogen bond to the aceto­nitrile mol­ecule. This leads to the formation of a two-dimensional supramolecular pattern along the bc plane.