Ammonium hydrogen bis[(3-chloro-2-methylphenoxy)acetate]

Abstract

In the structure of the ammonium hydrogen salt of (3-chloro-2-methylphenoxy)acetic acid, NH4+·C18H17Cl2O6−, the dimeric anion comprises two inversion-related head-to-head components linked through a short symmetric carboxyl O...H...O hydrogen bond in which the delocalized acid H atom lies on an inversion centre. The ammonium cation is disordered over another inversion centre. The crystal structure is based on a number of inter-species ammonium N—H...O hydrogen-bonding associations, giving two-dimensional layers lying parallel to (001).