4-Meth­oxy­benzamidinium bromide

The title salt, C₈H₁₁N₂O⁺·Br⁻, was synthesized by the reaction between 4-meth­oxy­benzamidine (4-amidino­anisole) and hydro­bromic acid. In the cation, the amidinium group has two similar C—N bonds [1.304 (2) and 1.316 (2) Å], and its plane forms a dihedral angle of 31.08 (5)° with the benzene ring. The ions are associated in the crystal into a three-dimension hydrogen-bonded supra­molecular network featuring N—H⁺...Br⁻ inter­actions.