光线对四溴乙烷合成反应的影响

Effect of Light on the Synthesis of Tetrabromoethan

主要研究了光线照射对四溴乙烷合成过程的影响。研究表明,光线条件对溴素与乙炔加成反应过程有非常明显的影响。增加光照,可以加快溴素与乙炔的加成反应速率,缩短合成反应时间,并使合成反应在夜晚正常进行。同时,增加光照可使溴素与乙炔的加成反应进行得更加完全,从而降低副产物生成量,提高溴素的转化率和四溴乙烷收率。初步分析了光线照射影响四溴乙烷合成反应的作用机理。

The effect of light on the synthesis of tetrabromoethan was studied in this paper.Results show that the addition reaction of bromine with acetylene was obviously influenced by light condition.The addition reaction speed of bromine with acetylene was accelerated and the reaction time was decreased by using of light,and the addition reaction could finish normally at night due to the using of light.In the meantime,the extent of addition reaction,conversion rate of bromine and the yield coefficient of tetrabromoethan were increased,and the yield of by-product was decreased by using of light.The mechanism of light influencing the addition reaction was also studied.