Catalytic cleavage of <i>p</i>-nitrophenyl diphenyl phosphinate by hydroxamate ions

Abstract

The reaction of <i>p</i>-nitrophenyl diphenyl phosphinate with two N-substituted hydroxamic acids

(<i>N</i>-phenylbenzohydroxamic acid and <i>N</i>-methyl 2-chlorobcnzohydroxamic acid) in three different cationic surfactants (cetyltrimethylammonium bromide, cetyltriphenylphosphonium bromide and cetyldimethylethanolammon ium bromide) at <i>p</i>H 9.1 (27°C) have been studied. The pseudo- first order rate constant increases with surfactant concentration. The pseudophase model has been applied to rate data to explain the behavior of binding of the substrate and nucleophiles.