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

In an effort to discover new potential boron-dipyrromethene (BODIPY) dyes, the title compound, C(19)H(17)BF(2)N(4)O(4), was prepared from 2,4-dimethyl­pyrrole, 3,5-dinitro­benzaldehyde and boron trifluoride in a one-pot reaction. The BODIPY fragment is nearly planar, with a maximum deviation from the least-squares plane of 0.251 (2) Å, and the benzene ring is inclined at a dihedral angle of 86.8 (6)° to the BODIPY mean plane. In the crystal, pairs of C—H⋯F hydrogen bonds connect neighbouring mol­ecules into inversion dimers, which are linked by further strong C—H⋯F inter­actions, forming a supra­molecular layered array parallel to the bc plane.