Study of Methylidyne Radical (CH and CD) Reaction with 2,5-Dimethylfuran Using Multiplexed Synchrotron Photoionization Mass Spectrometry
作者:Erica Carrasco、Giovanni Meloni
DOI:10.1021/acs.jpca.8b04140
日期:2018.7.26
At 298 K the reactions of 2,5-dimethlyfuran + CH(X2Π) and + CD radicals were investigated using synchrotron radiation coupled with multiplexed photoionization mass spectrometry at the Lawrence Berkeley National Laboratory. Reaction products were characterized based on their photoionization spectra and kinetic time traces. The CBS-QB3 level of theory was used for all energy calculations, and potential
在298K的2,5- dimethlyfuran反应+ CH(X 2 Π),并使用在劳伦斯伯克利国家实验室加上多路复用光电离质谱同步加速器辐射+ CD自由基进行了调查。根据反应产物的光电离光谱和动力学时间轨迹对反应产物进行表征。CBS-QB3理论水平用于所有能量计算,势能表面扫描用于确定热力学上有利的反应机理。反应中观察到的两个进入途径是CH插入C-O键和CH加成π键系统。两者均产生初始的6元环自由基中间体。在m / z处观察到CH加成途径的初级产物=108、66和42。在m / z= 108处形成的两个C 7 H 8 O异构体为1,2,4-庚三烯-6-和3-庚-5-炔-2-。在m / z = 66时,观察到的三个C 5 H 6异构体为1,3-环戊二烯,3-戊烯-1-炔(E)和1-戊-4-炔。还观察到了丁烯(m / z = 42)。从CH插入入口通道,三个C 6 H 8产生的异构体是1,2