Data collection

R factor = 0.039; wR factor = 0.104; data-to-parameter ratio = 16.1. In the title compound, C10H5IO3, an iodinated 3-formyl-chromone derivative, the non-H atoms are essentially coplanar (r.m.s. deviation = 0.0259 Å), with the largest deviation from the least-squares plane [0.056 (5) Å] being found for the formyl O atom. In the crystal, molecules are linked through I O halogen bonds [I O = 3.245 (4) Å, C— I O = 165.95 (13) and C O I = 169.7 (4)] along [101]. The supramolecular chains are assembled into layers via – stacking interactions along the b axis [shortest centroid– centroid distance between the pyran and benzene rings = 3.558 (3) Å]. Related literatur