首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Reaction Dynamics Study of the Molecular Hydrogen Loss Channel in the Elementary Reactions of Ground-State Silicon Atoms (Si(P-3)) With 1-and 2-Methyl-1,3-Butadiene (C5H8)
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Reaction Dynamics Study of the Molecular Hydrogen Loss Channel in the Elementary Reactions of Ground-State Silicon Atoms (Si(P-3)) With 1-and 2-Methyl-1,3-Butadiene (C5H8)

机译:用1-甲基-1,3-丁二烯(C5H8)(C5H8)基础硅原子(Si(P-3))基本反应中的分子氢气损失通道的反应动力学研究(C5H8)

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摘要

The bimolecular gas-phase reactions involving ground-state atomic silicon (Si; P-3) and 1- and 2-methyl-1,3-butadiene were studied via crossed molecular beam experiments. Our data revealed indirect scattering dynamics through long-lived SiC5H8 collision complex(es) along with molecular hydrogen loss pathways, leading to facile formation of SiC5H6 isomer(s). We propose that the reactions of silicon with 1- and 2-methyl-1,3-butadiene possess reaction dynamics in an analogy to the silicon-1,3-butadiene system. This leads to cyclic methyl-substituted 2-methylene-1-silacyclobutene isomers via nonadiabatic reaction dynamics through intersystem crossing (ISC) from the triplet to the singlet surface in overall exoergic reactions through tight exit transition states and molecular hydrogen loss. Our study also suggests that the methyl group.although a spectator from the chemical viewpoint.can influence the disposal of the angular momentum into the rotational excitation of the final product.
机译:通过交叉分子束实验研究了基态原子硅(Si;P-3)与1-和2-甲基-1,3-丁二烯的双分子气相反应。我们的数据揭示了通过长寿命SiC5H8碰撞复合物(es)以及分子氢损失途径的间接散射动力学,导致SiC5H6异构体(s)的容易形成。我们认为,硅与1-和2-甲基-1,3-丁二烯的反应具有类似于硅-1,3-丁二烯体系的反应动力学。这导致在通过紧密出口过渡态和分子氢损失的整体外能反应中,通过从三重态到单重态表面的系统间交叉(ISC),通过非绝热反应动力学生成环甲基取代的2-亚甲基-1-硅环丁烯异构体。我们的研究还表明,甲基。虽然从化学角度来看,他是个旁观者。可以影响角动量在最终产物的旋转激发中的处理。

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