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Computational study on the multi-channel mechanism of disulfur and ozone reaction

机译:硫与臭氧反应多通道机理的计算研究

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摘要

The reaction mechanism of disulfur (S _2) and O _3 on the triplet and singlet potential energy surfaces has been investigated theoretically at the B3LYP/6-311 + G(3df) and G3B3 levels. The definite mechanism has not been obtained for the S _2 + O _3 reaction on the triplet potential energy surface while one stable collision complex, IN1 (S-cyclic-SOOO), has been considered between S _2 and O _3 reactants on the singlet potential energy surface. Through variety of IN1 transformations, three kinds products S + SO _3(D _(3h)), SSO + O _2, and SO _2 + SO are obtained. The results show that the S _2 + O _3 reaction proceeds on the singlet potential energy surface to produce SSO + O _2 as main product. The rate constant of S _2 + O _3 + SSO + O _2 reaction is small value of 2.71 × 10 ~(-20) cm ~3 molecule ~(-1) s ~(-1) under atmospheric conditions. Therefore, S _2 molecule reacts with O _3 at the high temperatures.
机译:从理论上研究了B3LYP / 6-311 + G(3df)和G3B3水平上三重态和单重态势能表面上的S(_2)和O _3的硫的反应机理。在三重态势能表面上的S _2 + O _3反应尚未获得确定的机理,而在单重态势能的S _2和O _3反应物之间考虑了一个稳定的碰撞配合物IN1(S-cyclic-SOOO)能量表面。通过各种IN1转换,获得了三种乘积S + SO _3(D _(3h)),SSO + O _2和SO _2 + SO。结果表明,S _2 + O _3反应在单线态势能面上进行,以SSO + O _2为主要产物。在大气条件下,S _2 + O _3 + SSO + O _2反应的速率常数为2.71×10〜(-20)cm〜3分子〜(-1)s〜(-1)的较小值。因此,S _2分子在高温下与O _3反应。

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