(Z)-1-[(2E)-3,4-Diphenyl-2,3-di­hydro-1,3-thia­zol-2-yl­idene]-2-[1-(4-hy­droxy­phen­yl)ethyl­idene]hydrazinium bromide including an unknown solvate

In the title compound, C(23)H(20)N(3)OS(+)·Br(−), the di­hydro­thia­zole ring (r.m.s. deviation = 0.015 Å) is twisted with respect to each of the C- and N-bound phenyl rings and the hy­droxy­benzene ring, making dihedral angles of 76.0 (2), 71.2 (2) and 9.8 (2)°, respectively. In the crystal, inversion-related mol­ecules are linked by association of the bromide ions with the cations via N—H⋯Br and O—H⋯Br hydrogen-bonding inter­actions. These mol­ecules run in channels parallel to the a axis through face-to-face π–π stacking inter­actions between the hy­droxy­benzene rings [centroid–centroid distances = 3.785 (3) Å] which, in turn, are connected into layers parallel to (110) by weak C—H⋯π inter­actions. A small region of electron density well removed from the main mol­ecule and appearing disordered over a center of symmetry was removed with PLATON SQUEEZE [Spek (2009 ▶). Acta Cryst. D65, 148–15] following unsuccessful attempts to model it as plausible solvent molecule. The nature of the solvent was not known and hence, this is not taken into account when calculating M (r) and related data.