Collect. Czech. Chem. Commun. 1983, 48, 3279-3286

Kinetics of the reaction between hexamethylenediisocyanate and 1-pentanol

Slavko Hudeček, Miloslav Bohdanecký, Ivana Hudečková, Pavel Špaček and Pavel Čefelín

Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, 162 06 Prague 6


The reaction between hexamethylenediisocyanate and 1-pentanol in toluene was studied by means of reversed-phase liquid chromatography. By employing this method, it was possible to determine all components of the reaction mixture including both products, i.e. N-(6-isocyanate hexyl)pentylcarbamate and N,N'-bis(pentyloxycarbonyl)hexamethylenediamine. Relations for the calculation of kinetic constants were derived assuming a competitive consecutive second-order reaction. It was demonstrated that the reaction involved in this case is indeed a second-order reaction, and the rate constants of the first and second consecutive reactions were determined.