2,2′-二苯并咪唑的合成与提纯  

Synthesis via a modified method and purification of 2,2′-bibenzimidazole

作　　者：唐怀军[1] 张志国[1] 从长杰[1] 张克立[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《化学试剂》2007年第12期733-735,共3页Chemical Reagents

摘　　要：对Vyas法合成2,2′-二苯并咪唑进行了有效的改进。采用冰醋酸取代使用较广的乙二醇作为提纯溶剂,效果更优。采用DSC和TG分析技术,更为准确地确定了标题化合物的熔点为411℃,并同时首次发现其大约在365℃以后存在显著的升华现象。In this paper, the method of Vyas for synthesizing 2,2＇-bibenzimidazole was effectively modified. Ethylene glycol which was widely used as the solvent for purifying 2,2＇-bibenzimidazole via recrystallization was substituted by glacial acetic acid, resulting in a more excellent purifying effect. The more accurate melting point 411 ℃ of 2, 2＇-bibenzimidazole was measured by DSC and TG, and for the first time the sublimation of this compound at 365 ℃ was discovered.

关 键 词：2 2'-二苯并咪唑 提纯 熔点 DSC TG 升华 

分 类 号：O626.23[理学—有机化学]