Acta Cryst. (2013). E69, o964-o965 [ doi:10.1107/S1600536813013755 ]
Abstract: The title compound, C15H18NO3PS·C6H6, is a rare example of a crystallographically characterized exocyclic phosphiniminium-arenesulfonate zwitterion, which crystallises as its benzene solvate. The crystal structure shows that the N atom is protonated and that the iminium H atom forms both intra- and intermolecular hydrogen bonds to the single-bonded sulfonate O atom in an R22(4) graph-set motif. The dihedral angle between the aromatic rings in the main molecule is 89.49 (8)°.
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