Free radical addition to olefins. Part XV. Addition of bromoform and carbon tetrabromide to fluoroethylenes
作者:David S. Ashton、David J. Shand、John M. Tedder、John C. Walton
DOI:10.1039/p29750000320
日期:——
relative rates of addition of tribromomethyl and dibromomethyl radicals to the alkenes were estimated, and the orientation ratio for addition of each radical to vinyl fluoride and trifluoroethylene was obtained. The orientation ratios of radicals with any unsymmetrical alkene show significant correlations with the size and polarity of the radicals so that the orientation of radical addition appears to be
在150°C的密封管实验中已研究了过氧化氢引发的四溴化碳和溴仿向乙烯,氟乙烯,1,1-二氟乙烯,三氟乙烯和四氟乙烯的加成反应。四溴化碳的主要产物是涉及三溴甲基基团的加合物,而在溴仿实验中,发现二溴甲基和三溴甲基基团都是重要的载链物质。形成端粒,并且端粒形成的程度随着烯烃中氟含量的增加而增加。估计了三溴甲基和二溴甲基自由基向烯烃的加成的相对速率,并且获得了每个自由基向氟乙烯和三氟乙烯加成的取向比。