A substituent chemical shift (SCS) effect study by13C and19F NMR ofpara-substituted phenylhalodiazirines
作者:Jacek Terpinski、Dorothy Z. Denney、Richard Beveridge、D. Phillip Cox、Robert A. Moss
DOI:10.1002/mrc.1260251018
日期:1987.10
A range of 3-(para-substituted-phenyl)-3-halodiazirines have been prepared and their 13C and 19F NMR spectra measured. Calculated with these data were the susceptibility coefficients ρI and ρR of the inductive (σI) and resonance (σR0) effects, respectively, to substituent-induced chemical shift differences at the diazirine carbon (13C NMR) and the 3-fluorine (19F NMR of the 3-fluorodiazirine series). An inverse relationship was found between the susceptibility parameters and the electronegativity of the halo substituent at the diazirine carbon.
我们制备了一系列 3-(对位取代苯基)-3-卤代二氮杂环丁烷,并测量了它们的 13C 和 19F NMR 光谱。根据这些数据计算出了对重氮碳(13C NMR)和 3-氟(3-氟二氮杂环胺系列的 19F NMR)取代基引起的化学位移差异的感应(σI)效应和共振(σR0)效应的易感系数 ρI 和 ρR。发现易感性参数与二氮丙啶碳上卤代基的电负性之间存在反比关系。