Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5134628 | Journal of Analytical and Applied Pyrolysis | 2017 | 5 Pages |
â¢Pyrolysis of exo-2-norbornyl formate is homogeneous, unimolecular, and first-order.â¢Unusual products formation in pyrolysis of esters with the presence of a CβH bond.â¢Experimentals suggests a concerted three-membered cyclic transition state mechanism.
The rate coefficient of the gas-phase pyrolysis or elimination of exo-2-norbornyl formate was determined in a deactivated, static reaction vessel over the temperature range 300-350 °C and pressure range 41-105 Torr. The substrate exo-2-norbornyl formate yielded surprisingly exo-2-norborneol and CO gas. This reaction, in the presence or absence of the free radical inhibitor toluene, proved to be homogeneous, unimolecular and follows a first-order rate law. The rate of equation is given by the following Arrhenius equation: log k1 (sâ1) = (13.85 ± 0.23) â (194.6 ± 2.7)kJ molâ1(2.303RT)â1, r = 0.9998.Experimental data suggested a semi-polar concerted three-membered cyclic transition state type of mechanism.
Graphical abstractDownload high-res image (52KB)Download full-size image