Triethylammonium 1,1′-binaphthyl-2,2′-diyl phosphate

In the crystal structure of the title compound, C6H16N+·C20H12O4P−, an N—H...O interaction links the cation to the anion. The N atom in the triethylammonium cation exhibits a trigonal-bipyramidal coordination geometry and forms an N—H...O interaction with one phosphate O atom of the 1,1′-binaphthyl-2,2′-diyl phosphate ligand. A bifurcated C—H...O interaction with the other phosphate O atom links molecules along the a axis. The dihedral angle between the two naphthyl ring systems is 58.92 (3)°. The refined Flack parameter value of 0.50 (10) indicates inversion twinning.