10-{4-[(2-Hy­droxy­benzyl­idene)amino]­phen­yl}-5,5-di­fluoro-1,3,7,9-tetra­methyl-5H-di­pyrrolo­[1,2-c:2′,1′-f][1,3,2]di­aza­borinin-4-ium-5-uide

The title compound, C₂₆H₂₄BF₂N₃O, comprises a boron–dipyrromethene (BODIPY) framework and a phenolic Schiff base substituent group. The BODIPY unit is close to planar [maximum deviation from the least-squares plane = 0.040 (3) Å], and forms a dihedral angle of 80.38 (13)° with the meso-substituent phenyl ring and an angle of 56.57 (13)° with the phenolic ring in the extended substituent chain. An intra­molecular O—H...N hydrogen bond is formed between the phenolic hydroxyl group and the Schiff base N-atom. The crystal studied was a non-merohedral twin with a BASF factor of 0.447 (3) for the two components.