Substituent Chemical Shifts of 2-Aryl Derivatives of Benzimidazole, Benzimidazolium Ion, and Benzimidazoline

Bulletin of the Korean chemical society

Chang Kiu Lee¹  In Sook Han Lee¹ 

关键词: Substituent chemical shifts;    Hammett correlation;    Benzimidazole derivatives;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

NMR spectra of a series of 2-arylbenzimidazoles, 2-aryl-1,3-dimethylbenzimidazolium iodides, and 2-aryl- 1,3-dimethylbenzimidazolines were examined by correlating ¹H and ¹³C chemical shift values with the Hammett substituent constants �?. The signals corresponding to C-2 of the imidazole ring show good correlation with the largest �? values in each series. The �? values for C-2 of the benzimidazoles and the benzimidazolium ions were very close, but that of the benzimidazoline was about a half of the former series.

【 授权许可】

Unknown