F原子与i—CH_7I反应的动力学研究

The Kinetic Study of the Reaction of Fluorine with 2-Iodopropane

本文利用交叉分子束技术和激光诱导萤光方法,研究了F+i-C_3H_7I→IF+i-C_3H_7反应的动力学过程。获得了产物IF相对初生振动分布和相对细致反应速率常数。初生态布居接近于模型Ⅲ下的统计理论期待值,这不仅表明反应经过长寿命“配合物”,而且也说明自由基i-C_3H_7的内态是激发的。另外,确定了反应的产物IF内部能量分配和总反应截面σ,σ=(3.6±0.5)×10^(-16)cm^2.

The dynamics of the reaction F+i-C_3H_7I→i-C_3H_7 has been investigated using crossed molecular beam technique and laser-induced fluorescence method. The relative nascent vibrational state distributions of product IF and the relative detailed reaction rate constants have been obtained. The state populations are close to the statistical expectations of the model Ⅲ indicating the reaction proceed through a long-lived complex and the radical i-C_3H_7 is excited. The internal energy disposal of product IF and the total reaction cross section σ have been determined as (3.6±0.5)×10^(-16) cm^2.