title: {2-[(3,5-Dimethyl-2H-pyrrol-2-yl-idene-κN)(4-nitro-phen-yl)meth-yl]-3,5-dimethyl-1H-pyrrol-1-ido-κN}difluoridoboron.
abstract: In an effort to discover novel and potential boron-dipyrromethene (BODIPY) dyes, the title compound, C(19)H(18)BF(2)N(3)O(2), was prepared from 2,4-dimethyl-pyrrole, 4-nitro-benzaldehyde and BF(3)·Et(2)O in a one-pot reaction. There are two independent mol-ecules, A and B, in the asymmetric unit in which the dihedral angles between the benzene ring and boron-dipyrromethene mean plane have significantly different values [82.71 (8)° for mol-ecule A and 73.16 (8)° for mol-ecule B]. Inter-molecular C-H⋯π inter-actions help to stabilize the crystal structure.
authors.affiliation: Key Laboratory of Fine Petrochemical Technology, Changzhou University, Changzhou 213164,  People's Republic of China.
authors.forename: Ai-Jun
authors.initials: AJ
authors.lastname: Cui
authors.forename: Jie
authors.initials: J
authors.lastname: An
authors.forename: Fu-An
authors.initials: FA
authors.lastname: Sun
authors.forename: Meng
authors.initials: M
authors.lastname: Hu
authors.forename: Jing
authors.initials: J
authors.lastname: Qin