N-[2,4-Dioxo-3-azatricyclo-[7.3.1.05,13]trideca-1(13),5,7,9,11- pentaen-3-yl]thiourea

Abstract

In the two independent molecules in the asymmetric unit of the title compound, C13H9N3O2S, the azatricyclo-trideca-penta-ene ring system is approximately planar with r.m.s. deviations of 0.022 and 0.033 Å. The urea unit connected to the fused rings is approximately perpendicular [dihedral angles = 82.4 (1) and 82.7 (1)°]. In the crystal, the molecules associate by N - H⋯O hydrogen bonds, forming a chain running along the a axis. The crystal studied was a non-merohedral twin with a fractional contribution of 49.6 (1)% for the minor domain.