The stability constants of polyvalent cations and aromatic arsonic acids—II Complexes of the uranyl ion with arsonic acid

Abstract

Stability constants have been measured for the complexes of the uranyl ion with 2-hydroxybenzene arsonic acid and 2–4 dihydroxy benzene arsonic acid in aqueous media at 2 ± 0·1°C. Possible structures are postulated for the complexes. Intramolecular hydrogen bonding, which prevents intermolecular association of arsonyl (As = 0) oxygens with uranyl ions in other molecules of the complexes, may be responsible for their relatively high solubilities complared to those of uranyl complexes with benzene arsonic acid and 4-hydroxybenzene arsonic acid, in which intermolecular association via arsonyl oxygen atoms is possible.