Abstract: | In the molecular structure of the title compound, C6H14N+·C12H10O4P?, three O atoms are bonded to phosphorus. The oxygen connected to the biphenoxy residue is not involved in hydrogen bonding; of the other two, one oxygen is involved in intermolecular hydrogen bonding to an N—H group as well as the O—H group of the biphenoxy residue, while the second oxygen is involved in hydrogen bonding to two N—H groups. |