Two salts of the 6,6-di-fluoro-6H-dibenzo[c,e][1,2]oxaborinin-6-ide anion with different cations.

The crystal structures are reported of the 6,6-di-fluoro-6H-dibenzo[c,e][1,2]oxaborinin-6-ide (or 9,9-di-fluoro-10-oxa-9-boraphenanthren-9-ide) anion with two different cations, namely, potassium 6,6-di-fluoro-6H-dibenzo[c,e][1,2]oxaborinin-6-ide, K(+)·C(12)H(8)BF(2)O(-), (II), featuring a polymeric structure, and bis-(tetra-phenyl-phospho-nium) bis-(6,6-di-fluoro-6H-dibenzo[c,e][1,2]oxaborinin-6-ide) aceto-nitrile tris-olvate, 2C(24)H(20)P(+)·2C(12)H(8)BF(2)O(-)·3CH(3)CN, (III), which is composed of discrete cations, anions and aceto-nitrile solvent mol-ecules linked by C-H⋯O, C-H⋯N and C-H⋯F hydrogen bonds. There are only minor differences in the geometrical parameters of the anions in these structures.