2,4,6-Tris-(4-fluorophenyl)-2-(1-pyridyl)-boroxine

Abstract

Crystals of the title compound, C23H17B3F3NO3, were obtained unintentionally by slow evaporation of a chloro-form solution of the preformed boroxine-pyridine adduct. The mol-ecule contains three fluoro-substituted benzene rings, each bonded to one of the three B atoms of a six-membered boroxine ring. A pyridyl ring is also bound to one of the B atoms through a Lewis acid-base inter-action. The binding of the pyridyl substituent causes the otherwise planar boroxine ring to twist, resulting in a maximum torsion angle within the ring of 17.6 (2)°. © International Union of Crystallography 2008.