10-[(4-Nitro-phen-yl)ethyn-yl]-10-pheno-thia-zine.

The title compound, CHNOS, is a 10-ethynyl-10-pheno-thia-zine derivative. The pheno-thia-zine unit has a butterfly shape, where the folding angle between the two benzene rings is 153.87 (7)°, which is almost as in other reported pheno-thia-zine derivatives.

4-(Prop-2-yn-1-yl-oxy)benzaldehyde.

In the title mol-ecule, C10H8O2, all non-H atoms are essentailly coplanar (r.m.s.