Abstract
We have explored the potential energy surface of the triplet oxygen atom O(3P) reaction with 1,3-butadiene at CBS-QB3 levels of theory. Possible different pathways have been determined to better understand the reaction mechanism. Thus, the first pathway of the oxidation of 1,3-butadiene by the triplet oxygen O(3P) is show that the major product is CH3-CO-CH=CH2. The results agree with those obtained experimentally in relative to the reaction enthalpies. The transition state theory (TST) was employed to compute rate constants over the temperature range 297-798K. The obtained results have shown that the electrophilic O-addition pathways on the double bond are dominant up in the temperature range. The activation energy is in line with the proposed addition mechanism.
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