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首页> 外文期刊>Journal of Fluorine Chemistry >Theoretical study of the thermochemistry and the kinetics of the SF_xCl (x = 0-5) series
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Theoretical study of the thermochemistry and the kinetics of the SF_xCl (x = 0-5) series

机译:SF_xCl(x = 0-5)系列的热化学和动力学的理论研究

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摘要

A systematic thermodynamic and kinetic study of the entire SF_xCl (x = 0-5) series has been carried out. High-level quantum chemical composite methods have been employed to derive enthalpy of formation values from calculated atomization and isodesmic energies. The resulting values for the SCl, SFC1, SF2Cl(C1), SF3Cl(C_s), SF4Cl(C_s) and SF5Cl molecules are 28.0, -36.0, -64.2, -134.3, -158.2 and -237.1 kcal mol~(-1). A comparison with previous experimental and theoretical values is presented. Statistical adiabatic channel model/classical trajectory, SACM/CT, calculations of selected complex-forming and recombination reactions of F and Cl atoms with radicals of the series have been performed between 200 and 500 K.The reported rate coefficients span over the normal range of about 6 x 10~(-12) and 5 × 10~(-11) cm~3 molecule~(-1) s~(-1) expected for this type of barrierless reactions.
机译:对整个SF_xCl(x = 0-5)系列进行了系统的热力学和动力学研究。已采用高级量子化学复合方法从计算的雾化和等渗能量中导出形成值的焓。 SCl,SFC1,SF2Cl(C1),SF3Cl(C_s),SF4Cl(C_s)和SF5Cl分子的结果值为28.0,-36.0,-64.2,-134.3,-158.2和-237.1 kcal mol〜(-1) 。与以前的实验和理论值进行了比较。统计绝热通道模型/经典轨迹,SACM / CT,F和Cl原子与该系列自由基的所选复杂形成和复合反应的计算已在200至500 K之间进行。报告的速率系数跨越了正常范围对于这种无障碍反应,预期约有6 x 10〜(-12)和5×10〜(-11)cm〜3分子〜(-1)s〜(-1)。

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