Diclofenac Salts. IV. Tris(2-hydroxyethyl)ammonium 2-(2,6-Dichlorophenylamino)phenylacetate

The structure of the salt of 2-(2,6-dichlorophenylamino)phenylacetic acid (HD) with tris(2-hydroxyethyl)amine (TEA), C₆H₁₆NO₃⁺.C₁₄H₁₀Cl₂NO₂⁻, consists of hydrogen-bonded HTEA⁺ cations and D⁻ anions, as found in similar acid–base adducts of HTEA. There are no intermolecular hydrogen bonds between the ammonium H atom and the phenylacetate group, which may be attributed to the presence of a weak trifurcated intramolecular N—H...(O)₃ hydrogen bond within the cation. Interion hydrogen bonds are established through the OH groups of the cations, leading to a two-dimensional network.

-1