Kinetics and thermodynamics of the proton-transfer reactions of 2,4-dinitrophenol with some amine bases in chlorobenzene studied by a microwave temperature-jump method

Abstract

The proton-tranfer reactions of 2,4-dinitrophenol with trimethylamine, tri-n-octylamine, quinuclidine and triethylenediamine in chlorobenzene at 25°C have been studied. Equilibrium constants have been determined spectrophotometrically, and rate constants for some of the reactions have been determined by means of a microwave temperature-jump apparatus. The forward rate constants are one-tenth to one-hundredth of the value calculated for diffusion control. They do not correlate with the equilibrium constants, but appear to be related to steric factors.