The preparation and crystal structures of novel perhydrates Ph4X+Hal−·nH2O2: anionic hydrogen-bonded chains containing hydrogen peroxide

Abstract

Eight novel perhydrates Ph₄X⁺Hal⁻·nH₂O₂ (X = P, As; Hal = Cl, Br; n = 0.98–1.90) were prepared and their structures were determined by X-ray crystallography. All the structures are formed by parallel infinite zigzag chains of Ph₄X⁺ cations and hydrogen-bonded anionic chains [(H₂O₂)_x(Hal⁻)_y]_∞ (x, y = 1, 2). Hydrogen peroxide is partially substituted by admixed water molecules. Some of the studied perhydrates were found to be isostructural with the related hydrates Ph₄X⁺Hal⁻·nH₂O.