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取代基的电子效应对苯甲酰苯胺衍生物NMR化学位移的影响
THE INFLUENCE OF SUBSTITUENT ELECTRON EFFECT ON NMR CHEMICAL SHIFT OF SUBSTITUTED BENZANILIDE
【摘要】 用400MHz超导核磁共振波谱仪测定了X取代苯甲酰苯胺(X=p-NO_2,p-Cl,p-Br,p-1,H,p-CH_3,p-OCH_3,m-CH_3)的 ̄1H和 ̄(13)CNMR谱,按双参数方程进行计算,结果表明N- ̄1H,羰基碳,与羰基相连的苯环碳和与氮相连的苯环碳等碳原子的化学位移与取代基共轭效应参数σ_R和诱导效应参数σ_I间的良好的线性关系。测得了双参数方程中适用于苯甲酰苯胺衍生物的3个常数a、b和c的值以及σ_R、σ_I的权重。
【Abstract】 The 1H and 13C NMR spectra for a series of X-substituted benzanilide were ob-tained and analyzed on the basis of dual parameter equation. The three constants inthe equation were determined. The relative importance of resonance effect and fieldeffect were calculated. It was found that the linear correlation between the chemicalshifts of N-1H、C1、C2、C3、C6 and substituent effect σR、σI was good straight line.
【关键词】 取代基效应;
X-取代苯甲酰苯胺;
 ̄1H、 ̄(13)CNMR;
【Key words】 Substituent effect; X-substituted benzanilide,1H、13C NMR;
【Key words】 Substituent effect; X-substituted benzanilide,1H、13C NMR;
【基金】 国家自然科学基金
- 【文献出处】 波谱学杂志 ,CHINESE JOURNAL OF MAGNETIC RESONANCE , 编辑部邮箱 ,1994年01期
- 【分类号】O621.13
- 【被引频次】1
- 【下载频次】146