Crystal structure of dibenzylammonium hydrogen (4-aminophenyl)arsonate monohydrate

The title salt, C14H16N+center dot C6H7AsNO3-center dot H2O or [(C6H5CH2)(2)NH2][H2NC6H4-As(OH)O-2]center dot H2O, (I), was synthesized by mixing an aqueous solution of (4-aminophenyl)arsonic acid with an ethanolic solution of dibenzylamine at room temperature. Compound I crystallizes in the monoclinic P2(1)/c space group. The three components forming I are linked via N-H center dot center dot center dot O and O-H center dot center dot center dot O intermolecular hydrogen bonds, resulting in the propagation of an infinite zigzag chain. Additional weak interactions between neighbouring chains, such as pi-pi and N-H center dot center dot center dot O contacts, involving phenyl rings, -NH2 and -As(OH)O-3 functions, and H2O, respectively, lead to a three-dimensional network.