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本文采用DNMR法测定了一系列氮-2.4-二硝基苯基亚硫酰基苯并咪唑衍生物,围绕N-S键扭转的活化自由能△G~(++),即扭转位垒。实验结果表明,该系列亚硫酰胺类化合物,在亚硫酸胺类中具有最高的扭转位垒(大约19-20千卡/克分子)。
In this paper, a series of nitrogen-2.4-dinitrophenylsulfinylbenzimidazole derivatives were determined by DNMR method. The activation free energy ΔG ~ (++) around the N-S bond reverses the barrier. The experimental results show that the sulfoxide compounds of this series have the highest torsion barrier (about 19-20 kcal / mol) in sulfite amines.