Thermal Decomposition of 4,4‐Dimethylpentene−1 in a Single‐Pulse Shock Tube

Abstract

4,4‐Dimethylpentene−1 has been pyrolyzed in a single‐pulse shock tube. The initial process is apparently the breaking of the allylic carbon—carbon bond. The rate expressions for the reaction $${\mathrm{C}}_4{\mathrm{H}}_9-{\mathrm{C}}_3{\mathrm{H}}_5\to {\displaystyle {lim}^k}\mathrm{t-}{\mathrm{C}}_4{\mathrm{H}}_9\mathrm{·+}{\mathrm{C}}_3{\mathrm{H}}_5·$$ has been found to be $${\text{k=10}}^{\text{15.8}}\hspace{0.17em}\exp \text{(−65 500/RT)\hspace{0.17em}}{\sec }^{\text{−1}}.$$ Assuming no activation energy for the recombination process this leads to a value of 12 kcal for the allylic resonance energy.