交叉分子束研究氟原子与1,2-丁二烯反应动力学

利用通用型交叉分子束研究了氟原子与1,2-丁二烯的反应，观测到了C₄H₅F+H反应通道. 测量产物C₄H₅FF在实验坐标下的角度分辨的飞行时间谱，获得了这个通道质心坐标下的产物角分布和动能分布. 实验结果表明，相对于氟原子束方向，产物C₄H₅FF主要是后向散射，同时也有大量的前向散射. 这表明反应通道主要通过长寿命的络合物形成机理进行的，同时也伴有直接的双分子亲核取代反应(SN2)机理.

Crossed Beams Study on the Dynamics of F Atom Reaction with 1,2-Butadiene

We have investigated the dynamics of the F+C₄H₆ reaction using the universal crossed molecular beam method. The C₄H₅F+H reaction channel was observed in this experiment. Angular resolved time-of-flight spectra have been measured for the C₄H₅F product. Product angular distributions as well as kinetic energy distributions were determined for this product channel. Experimental results show that the C₄H₅F product is largely backward scattered with considerable forward scattering signal, relative to the F atom beam direction. This suggests that the reaction channel mainly proceeds via a long-lived complex formation mechanism, with possible contribution from a direct SN₂ type mechanism.