The Crystal and Molecular Structure of Ammonium p-Methylbenzenesulfonate

Ammonium p-methylbenzenesulfonate, , Mr = 189.23, orthorhombic, space group , a = 20.406(4), b = 6.271(1), c = 7.067(2), V = 904.19 , Z = 4, = 1.39, , = 0. 71069 , , T = 298K, F(000) = 400, final R = 0.057 for 994 unique observed reflections with I > . The methylbenzene portion including the sulfur atom is nearly planar. Between the groups and the ammonium ion, there are three unique hydrogen bonds; two of which make the anions linked along the c-axis and the remaining one along the b-axis. These hydrogen bonds make two-dimensionally hydrogen-bonded molecular layers. Among these hydrophilic layers, the methylbenzene moieties cluster together to form hydrophobic layers.