13-Nitro-benzo[ a][1,4]benzo-thia-zino[3,2- c]phenoxazine

Abstract

In the title compound, C₂₂H₁₁N₃O₃S, dihedral angle between the phenyl rings on the periphery of the molecule is 8.05 (18)°. In the crystal, aromatic π-π stacking distance and short C-H⋯O contacts are observed. The maximum absorption occurs at 688 nm.

Keywords: crystal structure; donor/acceptor; fused heterocyclic; ladder oligomer; non centrosymmetric dye.

Figure 1

Structure of title compound.with displacement ellipsoids drawn at the 50% probability level.

Figure 2

Stacking of molecules with shortest observed distances (atom to atom).

Figure 3

Reaction scheme for the preparation of the title compound.