Deuterierung von Azulen. II. Kinetik der Bildung von 1,3‐Dideuteroazulen in der Gasphase

The kinetics of exchange of protons in 1‐ and 3‐positions of the azulene molecule with heavy water in the gaseous phase at 140° C has been investigated. In the presence of large excess of heavy water the kinetics follows a simple two stage, first order reaction scheme, for which the rate constants have been measured. The hitherto unknown azulene‐d 1 isotope has been observed spectroscopically and shown to be involved in the reaction as an intermediate d o → d 1 → d 2 , with kinetically approximatively equivalent 1‐ and 3‐positions.