Crystal structure of 2-[(naphthalen-2-yl)meth­yl]iso­thio­uronium bromide

Herein we report the crystal structure of 2-[(naphthalen-2-yl)meth­yl]iso­thio­uronium bromide, C(12)H(13)N(2)S(+)·Br(−), which crystallizes in the monoclinic P2(1)/c centrosymmetric space group. The asymmetric unit contains one 2-[(naphthalen-2-yl)meth­yl]iso­thio­uronium cation and one bromide anion. The methyl­ene carbon lies in plane of the naphthalene core. In comparison with reference structures, elongation of C—S bonds as well as tilting of the iso­thio­uronium group is observed. Given the ionic nature of the compound, the structure is held by charge-assisted N—H⋯Br hydrogen bonds, with a noteworthy contribution of dipole–dipole inter­actions, which form bilayers in the structure. The bilayers are held by the weak London forces. [Image: see text]