Generation of 15N labelled bis(polyfluoroalkyl) nitroxides and their hydrogen-abstraction reactions with alkanes, alkylbenzenes and aldehydes
作者:Cheng-Xue Zhao、Guo-Fei Chen、Xi-Kui Jiang
DOI:10.1016/s0022-1139(00)81074-x
日期:1988.3
Blue solutions containing 15 labelled bis(polyfluoralkyl) nitroxides and spin traps, polyfluoronitrosoalkanes, were conveniently made from the reactions of Na15NO2 with polyfluoro-compounds, (RFCO2) and RFSO2Br in F113. It has been found that the nitroxides effected fast H-abstraction from alkanes, alkylbenzenes, aldehydes and the radicals derived from the substrates were in turn effectively trapped
由Na 15 NO 2与多氟化合物(R F CO 2)和R F SO 2 Br在F113中的反应可方便地制备包含15个标记的双(聚氟烷基)氮氧化物和自旋阱,多氟亚硝基链烷的蓝色溶液。已经发现,氮氧化物有效地从烷烃,烷基苯,醛中快速吸氢,而衍生自底物的自由基又被R F 15 NO有效地捕获,得到15 N标记的可通过ESR检测的自旋加合物。N越大(15 N)值以及氮氧化物和自旋加合物的简单拆分,使得对H原子吸收和其他自由基反应的动力学研究变得十分可行。
Di--butyl nitroxyl - radical induced homolysis of polyfluorodiacyl peroxides
In the presence of di--butyl nitroxide (DTBNO) polyfluorodiacylperoxides undergo rapid decomposition in -pentane or CClF2-CCl2F at −50 to +20°C. The reactions are first order in peroxide and DTBNO. On the basis of ESR observation of -butyl polyfluoroalkyl nitroxides as well as product analysis, it appears that the decomposition processes involve DTBNO inducedhomolysis of the peroxy bonds followed
A novel technique for the generation of bis(polyfluoroalkyl) and polyfluoroalkyl nitroalkyl nitroxides. ESR verification of mechanistic propositions for the reactions between polyfluorodiacyl peroxides and carbanions derived from secondary nitroalkanes
作者:Chengxue. Zhao、Xikui. Jiang、Guofei. Chen、Yanling. Qu、Xianshan. Wang、Jianying. Lu
DOI:10.1021/ja00271a068
日期:1986.5
ZHAO, CHENG-XUE;CHEN, GAO-FEI;QU, YAN-LING;JIANG, XI-KUI, J. FLUOR. CHEM., 37,(1987) N 2, 215-221