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本文对N-2.6-二氯苯基-N-苯基胺-2’-乙酸和N-2.6-二氯苯基-N-苯基胺-2’乙酸钠(双氯灭痛)进行了~(13)C核磁共振的研究。本实验利用FX—60Q脉冲付里叶变换核磁共振波谱仪(磁场强度为14093高斯,观察频率为15.04MHz)测定了这两种化合物的非去偶谱质子完全去偶谱和偏共振谱。借助于偏共振技术、质子完全去偶谱、取代基电负性,诱导效应,共轭效应、场效应、取代基化学位移加和规则等确定了各峰的化学位移和一键、二键偶合常数。实验结果表明C~(13)化学位移和一键、二键偶合常数~1Jc-Ⅱ、~2Jc-c-Ⅱ都有一定的规律。因此.它们不仅对鉴别此类化合物的结构可提供有力的依据,而且还能推断未知化合物的碳键状态。
In this paper, the effect of ~ (13) on N-2,6-dichlorophenyl-N-phenylamine-2’-acetic acid and N-2,6- C nuclear magnetic resonance research. In this experiment, we used the FX-60Q pulsed Fourier transform nuclear magnetic resonance spectrometer (the magnetic field intensity is 14093 Gauss and the observation frequency is 15.04MHz) to determine the complete decoupled spectra and partial resonance spectra of the non-dectected spectra of these two compounds. The chemical shifts of each peak and the one-bond, two-bond coupling were determined by means of off-resonance technique, complete decoupling of protons, electronegativity of substituents, inducing effect, conjugation effect, field effect, addition of chemical shifts of substituents and rules constant. The experimental results show that the chemical shifts of C ~ (13) and the one-bond and two-bond constants ~ 1Jc-Ⅱ and ~ 2Jc-c-Ⅱ all have certain rules. Therefore, they not only provide a strong basis for identifying the structures of these compounds, but also infer the state of carbon bonds of unknown compounds.