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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Reaction of the Butadiene Cation with Ethylene in the Gas Phase
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Reaction of the Butadiene Cation with Ethylene in the Gas Phase

机译：气相中丁二烯阳离子与乙烯的反应

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摘要

The structure of the addition product formed in the reaction of the trans-1,3-butadiene radical cation with ethylene is examined by using a flowing afterglow-triple quadrupole instrument. Energy-resolved collisioninduced dissociation studies show the product not to be the cyclohexene radical cation but likely the 2,4-hexadiene radical cation. It is shown that thermodynamics accounts for the preference of the 2,4-hexadiene ion over the cyclohexene ion but does not account for the preference of the 2,4-hexadiene ion over the 1-methylcyclopentene ion. Reaction of the 1-bromobutadiene radical cation with ethylene suggests but does not require that the cyclohexene cation be accessed as an intermediate in the reaction. It is suggested that the mechanism involves the concerted addition of ethylene to a C-H bond in the butadiene cation, as has been described previously for the cis ion.
机译：通过使用流动的余辉三重四极杆仪器检查在反式1，3-丁二烯自由基阳离子与乙烯的反应中形成的加成产物的结构。能量分辨的碰撞诱导解离研究表明，该产物不是环己烯自由基阳离子，而可能是2,4-己二烯自由基阳离子。已表明，热力学解释了2，4-己二烯离子相对于环己烯离子的优先性，但没有解释2，4-己二烯离子相对于1-甲基环戊烯离子的优先性。 1-溴丁二烯自由基阳离子与乙烯的反应表明但不要求将环己烯阳离子作为反应中的中间体。建议该机理涉及在丁二烯阳离子中将乙烯协同加成到C-H键上，如先前对顺式离子所描述的。

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