Abstract
In the title compound, C21H15FN2O2, the furan ring has a flattened half-chair conformation [the methine C atom lies 0.136 (2) angstrom above the C-5 plane which has an r.m.s. deviation of 0.0229 angstrom]. Overall, the 1H-benzo[f] chromene fused-ring system approximates a plane (r.m.s. deviation of the 14 non-H atoms = 0.049 angstrom). The fluorobenzene ring is almost perpendicular to this plane [dihedral angle = 89.58 (8)degrees]. Zigzag supramolecular tapes along the b axis are the most notable feature of the crystal packing. This arises through an alternating sequence of 12-membered {center dot center dot center dot HNC3N}(2) and eight-membered {center dot center dot center dot HNCO}(2) synthons. These are connected into a three-dimensional architecture by pi-pi [intercentroid distance for centrosymmetrically related fluorobenzene rings = 3.5181 (10) angstrom] and C-H center dot center dot center dot pi interactions.