本文用元素溴、N-溴代二乙胺和N-溴代丁二酰亚胺,对戊烷、已烷和庚烷进行光溴化,发现这三种溴化剂所得的溴戊烷、溴已烷和溴庚烷,它们所含异构体的比例都各不相同.其中以2-位异构体含量最多,1-位异构体几乎没有.作者等以溴分子的活性与烷基自由基移位进行解释,并与光照氯化结果相比较,氯化由于氯比较活泼,自由基来不及转位,即与氯反应,因而1-位异构体含量多。 Brominated pentane, hexane and heptane were brominated with elemental bromine, N-bromo-diethylamine and N-bromosuccinimide. The brominated pentane, Brominated hexane and bromine heptane, they contain isomers of different proportions, including 2-position isomers content most, 1 almost no isomers. The author of the bromine molecule activity and alkane Radical radical shift is explained, and compared with the results of light chlorination, chlorination due to chlorine more lively, too late for free radical translocation, that is, with chlorine reaction, and thus 1 - isomer content.