摘要
甲氧基硫代磷酰二氯(1)在三乙胺存在下,进行异构化反应,首先形成离子对中间体3,然后1将3烷基化成甲硫基磷酰二氯(2)。中间体3经NMR,IR和MS等鉴定,确定了其结构及反应性能。在此异构化反应中,三乙胺不是催化剂,具有催化作用的是中间体3。3本身不能自行异构化,异构化在3和1分子之间进行。动力学实验证明异构化过程中,存在着过渡态,该反应属表观一级。
It has been found that O-methyl phosphonodichloridothionate (1) in the presence of triethylamine formed an ionpair intermediate 3 initially, then 3 was alkylated by 1 to produce S-methyl phosphorodichloridothionate (2).The structure of intermediate 3 was proved by NMR, IR and MS.NMR observation showed the triethylamine was not catalyst,but 3 possessed the catalyst activity.The self-isomerization of 3 does not occur,and the isomerization must have taken place between 3 and 1.Dynamic study demonstrated this isomerization could belong to the apparent first order,and may be explained in terms of transitional state.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第3期278-282,共5页
Acta Chimica Sinica
基金
国家自然科学基金
