First-Generation Products of Trans-2-Hexenal Ozonolyis: A New Look at the Mechanism
Najoua Derbel1,2,3, Alexander Alijah3, Struan H Robertson4
1Laboratoire de Spectroscopie Atomique, Moléculaire et Applications, Department of Physics, Faculty of Sciences, University Tunis - El Manar, 1060 Tunis, Tunisia.
Abstract:
The ozonolysis reaction of trans-2-hexenal was studied theoretically on the basis of highly accurate CCSD(T)-F12b/AVTZ energy values obtained in M06-2X/AVTZ preoptimized nuclear configurations. The kinetics was modeled with the help of the master equation solver MESMER. Apart from the expected stable oxidation products 1-butanal (17%) and glyoxal (35%), a secondary ozonide is formed on the glyoxal channel, which is the principal first-generation product (49%). It is further shown that glyoxal is created on two competing pathways, one of which leads to simultaneous production of the ester propylformate (18%). The inclusion of all of these mechanisms explains the experimental findings and identifies for the first time the origin of the experimental carbon deficit.
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