Kinetic studies on fast reactions in solution : II. The reaction between 1,3,5-trinitrobenzene and diethyl amine in acetone

Abstract

The reaction between 1, 3, 5-trinitrobenzene (TNB) and diethylamine (DEA) in acetone was investigated at room temperature by the stopped flow method. By measuring the optical densities at 472 and 516 mμ in the course of the reaction, it was found that the reaction proceeded in two consecutive steps ; one is moderately fast and the other is slow. The stoichiometry of the intermediate having a maximum peak at 470 mμ may be one TNB molecule and one DEA molecule. This reaction is reversible and of first order both in TNB and in DEA. The influence of "aging" of DEA in acetone is conspicuous on the rate of increase in the optical density at 516 mμ. It was indicated from an elementary analysis and an infrared spectrum of the product that the product-complex having the maximum peak at 520 mμ may possess the stoichiometry, 1 : 2 : 1 for TNB, DEA and acetone. The overall reaction was discussd from the view point of kinetics.