Assessment of the intramolecular C–H⋯X (X=F, Cl, Br) hydrogen bonding of 1,4-diphenyl-1,2,3-triazoles
作者:Ben-Ye Lu、Zhi-Ming Li、Yuan-Yuan Zhu、Xin Zhao、Zhan-Ting Li
DOI:10.1016/j.tet.2012.08.061
日期:2012.10
The intramolecular six-membered C–H⋯X (X=F, Cl, Br) hydrogen bonding motif of halogen-substituted 1,4-diphenyl-1,2,3-triazole compounds has been assessed. Twelve triazole derivatives have been designed and prepared, which bear fluorine, chlorine or bromine atoms on the ortho- and/or para-positions of the benzene rings. 1H NMR, X-ray crystallography, and DFT calculation investigations revealed that
评估了卤素取代的1,4-二苯基-1,2,3-三唑化合物的分子内六元C–H⋯X(X = F,Cl,Br)氢键基序。已经设计和制备了十二种三唑衍生物,它们在苯环的邻位和/或对位带有氟,氯或溴原子。1 H NMR,X射线晶体学和DFT计算研究表明,三唑单元C-4上苯环的邻氟,氯和溴原子均可形成六元C–H⋯X氢粘接。相反,仅氟在三唑单元的N-1侧形成相似的,相对稳定的分子内氢键。