4-[2-(Hydrogen phosphonato)-2-hydroxy-2-phosphonoethyl]pyridinium

Abstract

The title compound, C7H11NO7P2, exists as a zwitterion in which the positive charge resides on the protonated pyridyl N atom and the negative charge on one of the two phosphate groups. In the crystal, adjacent molcules are linked by O—H...O and N—H...O hydrogen bonds into a three-dimensional network.