STRUCTURE OF 1-(3-BUTYNYL)PYRIDINIUM P-TOLUENESULFONATE

The 1-(3-butynyl)pyridinium p-toluenesulfonate salt, C9H10N+.C7H7O3S-, contains a C-H...O hydrogen bond between the acetylenic H atom of the cation and a sulfonate O atom of the anion in the solid state [C...O 3.32 (1), H...O 2.49 angstrom, C-H...O 159-degrees]. The X-ray analysi s was complicated by disorder in both the cation and anion. A major (8 5%) and a minor (15%) component of the 1-(3-butynyl)pyridinium cation are present, both occuping the same volume element in the lattice. The methyl H atoms and sulfonate O atoms of the p-toluenesulfonate anion are disordered over two orientations.