Direct observation of an isopolyhalomethane O–H insertion reaction with water: Picosecond time-resolved resonance Raman (ps-TR3) study of the isobromoform reaction with water to produce a CHBr2OH product
作者:Wai Ming Kwok、Cunyuan Zhao、Yun-Liang Li、Xiangguo Guan、David Lee Phillips
DOI:10.1063/1.1640997
日期:2004.2.15
Picosecond time-resolved resonance Raman (ps-TR3) spectroscopy was used to obtain the first definitive spectroscopic observation of an isopolyhalomethane O-H insertion reaction with water. The ps-TR3 spectra show that isobromoform is produced within several picoseconds after photolysis of CHBr3 and then reacts on the hundreds of picosecond time scale with water to produce a CHBr2OH reaction product
皮秒时间分辨共振拉曼光谱(ps-TR3)用于获得异聚卤甲烷OH与水反应的第一定性光谱观察结果。ps-TR3光谱显示,在CHBr3光解后的几皮秒内产生了异溴仿,然后在数百皮秒的时间尺度上与水反应生成CHBr2OH反应产物。低浓度溴仿在水溶液中的光解导致明显形成HBr强酸。从头算算表明,异溴仿可与水反应生成CHBr2(OH)OH插入反应产物和HBr离去基团。这与观察异溴仿与水形成CHBr2(OH)产物的ps-TR3实验以及显示HBr酸形成的光解实验均相一致。