ABSTRACT
In the crystalline state of the title solvate, C18H13NO3·C4H8O, hydrogen-bonding inter-actions between hydroxyl groups on a phenoxazine backbone and the tetra-hydro-furan solvent are observed that suggest the ability for this compound to act as a chelating ligand. The Oâ¯O donor-acceptor distances for this hydrogen bonding are 2.7729â (15) and 2.7447â (15)â Å. The three-ring backbone of the phenoxazine bends out of planarity by 18.92â (3)°, as computed using mean planes that encompass each half of the three-ring structure, with the central N and O atoms forming the line of flexion. In the crystal, a π-π stacking arrangement exists between inversion-related mol-ecules, with a centroid-to-centroid distance of 3.6355â (11)â Å. In the disordered tetra-hydro-furan solvate, all atoms except oxygen were modeled over two positions, with occupancies of 0.511â (8) and 0.489â (8).