The mechanism proposed by Waters for the oxidation of a-hydroxy-acids by manganic pyrophosphate accounts for the kinetics of oxidation of mandelic, DL-malic, and lactic acid by ceric sulphate. The reactants pass through a cyclic transition state involving the hydroxy-acid and cerium(1v). It is suggested that the reactive species of cerium is Ce(SO,), and that the HSO,ion plays the r61e of an active inhibitor by forming H,Ce(SO,),Z-on reacting with the sulphate.
In the present investigation the authors have determined the electric dipole values for twenty-three organic solutes according to Higasi's method. Except for two substances, viz., iodoform and ethylene dibromide, the dipole values so obtained agree fairly well with those obtained by usual methods. A reassessment of Higasi's equation has been made on theoretical grounds and a more general equation has been obtained.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.