五溴苄基溴的合成及表征

摘要

Pentabromobenzyl bromide was synthesized from pentabromotoluene arid bromine. The influences of molar ratio,reaction temperature and reaction time on the yield were investigated. The optimum reaction conditions were as follows : the molar ratio of bromine to pentabromotoluene was 1. 4∶ 1 ,the reaction temperature was 80 ℃ ,the reaction time was 2 h,the yield can reach 88. 5％ . The structure of pentabromobenzyl bromide was characterized by IR,1H NMR and DSC.%以五溴甲苯和溴为原料,合成了五溴苄基溴.考察了原料配比、反应温度及反应时间对反应收率的影响,确定的最佳反应条件为:n(溴):n(五溴甲苯)=1.4:1,反应温度80℃,反应时间2 h,收率达88.5%.并用IR,<'1>H NMR和DSC对产物结构进行了表征.