The title compound, C26H22O2P+·PF6−·C4H7O, crystallizes as a cation-anion pair with a single solvent molecule in the asymmetric unit. Hydrogen bonding occurs between the carboxylic acid group on the cation and the oxygen atom of the solvent molecule. Longer hydrogen-bonding interactions are observed between fluorine atoms of the anion and H atoms on the phenyl rings of the cation.
