Benzo[4,5]imidazo[2,1-b]thiazole-2-carbaldehyde

The title compound, C10H6N2OS, is planar, with an r.m.s. deviation of 0.021 Å for the non-H atoms. In the crystal, molecules are linked via a pair of C—H...O hydrogen bonds, forming inversion dimers with an R22(6) ring motif. The molecules stack up the c axis and are linked by offset π–π interactions [shortest inter-centroid distance = 3.647 (2) Å], forming undulating layers parallel to (100)