Аннотация:Solid-state photochromic indoline spiropyrans bearing a formyl group at the 6´ and 8´positions of the 2H-chromene moiety of the molecules were characterized. The molecularstructures of spiropyrans were established by single-crystal X-ray diff raction. Intermolecularinteractions and voids in the crystals were investigated using the CrystalExplorer17 softwarepackage. Further studies of photochromism and mechanochromism of these spiropyransin the crystalline state are shown to be promising.