Comparison of the electrophilic and free-radical addition of halogens with hexafluoro-1,3-butadiene and 1,3-butadiene
作者:Dale F Shellhamer、David C Gleason、G.Gawayne Vaughan、Andrew J Ryan、Peter K Titterington、Victor L Heasley、Jeffrey J Lehman
DOI:10.1016/s0022-1139(03)00115-5
日期:2003.10
Ionic and photochemical reaction of chlorine (Cl2), bromine (Br2) and iodine monochloride (ICl) to hexafluoro-1,3-butadiene (1) and 1,3-butadiene (2) were carried out under conditions that would provide product distributions under controlled ionic or free-radical conditions. Product distributions for ionic reaction of Cl2 and Br2 with 1 are similar and suggest a weakly-bridged halonium ion species
氯(Cl 2),溴(Br 2)和一氯化碘(ICl)与六氟-1,3-丁二烯(1)和1,3-丁二烯(2)的离子和光化学反应在受控的离子或自由基条件下的产物分布。Cl 2和Br 2与1发生离子反应的产物分布相似,表明弱桥合的ion离子种类。理论计算支持二烯1和2均弱桥联的氯鎓和溴离子。来自1的离子卤化的1,4-二卤-2-丁烯产物更多大于2的电荷,这与从1开始的ha离子的碳4上更大的电荷密度有关。ICl与1的离子和自由基反应分别得到8%和2%的3-氯-4-碘六氟-1-丁烯和4-氯-3-碘六氟-1-丁烯。当形成时,报告了来自1和2的次要顺式-1,4-二卤-2-丁烯产物。