Isoméirsation cis–trans de l'azobenzène catalysée par l'iode. III

Abstract

The cis–trans isomerization of azobenzene can be catalyzed by iodine. The rate constant for the reaction of cis-azobenzene with iodine atoms was determined as 2 ± 1 × 106 mol−1 1 s−1, i.e. a much larger value than that pertaining to other isomerizable systems. This very high reactivity of cis-azobenzene allowed the demonstration of surface effects which were unexpected in the liquid phase. A method for estimating low concentrations of iodine atoms can be based on this catalyzed isomerization. [Journal translation]