Cyclic Imide Dioximes: Formation and Hydrolytic Stability

Poly­(acrylamidoximes) play an important role in the uranium
extraction from seawater. The present work reports solution studies
of simple analogues to address the formation and stability of two
binding sites present in these polymers, open-chain amidoximes and
cyclic imide dioximes, including: (1) conditions that maximize the
formation of the cyclic form, (2) the existence of a base-induced
conversion from open-chain to cyclic form, and (3) degradation under
acid and base conditions.