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

In the crystal structure of the title compound, C6H 16N+·C20H12O 4P-, an N-H⋯O inter-action links the cation to the anion. The N atom in the triethyl-ammonium cation exhibits a trigonal-bipyramidal coordination geometry and forms an N-H⋯O inter-action with one phosphate O atom of the 1,1′-binaphthyl-2,2′- diyl phosphate ligand. A bifurcated C-H⋯O inter-action 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.