The title molecule, C11H10N2OS, shows a short intramolecular S ... O c
ontact of 2.622 (1) Angstrom, ca 0.6 Angstrom less than the sum of the
traditional van der Waals radii. Electrostatic attraction, due to cha
rge delocalization from the heterocycle into the carbonyl group, contr
ibutes to this short interaction.