Diaphragmless Electrosynthesis of Diphenylphosphate

Abstract

© 2020, Pleiades Publishing, Ltd. Abstract: The process of mediated diaphragmless electrosynthesis (platinum anode, nickel cathode) of diphenylphosphate from diphenylphosphite with alkali metal halides (KI, LiBr) used as the mediator is studied in water‑organic (acetonitrile, benzene) medium. It is found that after passing 2 F per mole of diphenylphosphite through the electrolyte, two phosphorus-containing compounds are detected in the reaction mixture: original diphenylphosphite and target diphenylphosphate. The highest content of diphenylphosphate is observed when the electrosynthesis is carried out in the water‑acetonitrile‑benzene mixture. It is found that the excess of protons in the electrolyte accelerates the hydrolysis of original diphenylphosphite.