The C-H...O hydrogen bond in (dicyanomethyl)ammonium p-toluenesulfonate.
In the title compound, C3H4N3+*C7H7O3S-, the activated C-H group of the cation forms a short but bent C-H.O hydrogen bond with a sulfonate O atom of the anion; C.O = 3.075 (5) A and C-H...O = 130 degrees.
Steiner
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Institut für Chemie-Kristallographie, Freie Universität Berlin, Takustrasse 6, D-14195 Berlin, Germany. steiner@chemie.fu-berlin.de