核磁溶剂峰和杂质峰

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1、常用氘代溶剂和杂质峰在1H-NMR 谱中的化学位移如下表所示(单位:ppm)溶剂CDC13(CD3)2CO(CD3)2SOC6D6CD3CNCD3OHD2O溶剂峰7.262.052.497.161.943.314.80水峰1.562.843.330.402.134.87乙酸2.101.961.911.551.961.992.08丙酮2.172.092.091.552.082.152.22乙腈2.102.052.071.551.962.032.06苯7.367.367.377.157.377.33叔丁醇CH31.281.181.111.051.161.401.24OH4.191.552.18乙醇

2、CH3(t)1.251.121.060.961.121.191.17CH2(q)3.723.573.443.343.543.603.65OH(s)1.323.393.632.47乙酸乙酯CH3CO2.051.971.991.651.972.012.07OCH2(q)4.124.054.033.894.064.094.14CH3(t)1.261.201.170.921.201.241.24乙二醇3.763.283.343.413.513.593.65正己烷CH3(t)0.880.880.860.890.890.90CH2(m)1.261.281.251.241.281.29甲醇CH33.493.

3、313.163.073.283.343.34OH1.093.124.012.16正戊烷CH3(t)0.880.880.860.870.890.90CH2(m)1.271.271.271.231.291.29异丙醇CH3(d)1.221.101.040.951.091.501.17CH4.043.903.783.673.873.924.02四氢吹喃CH21.851.791.761.401.801.871.88CH2O3.763.633.603.573.643.713.74甲苯CH32.362.322.302.112.332.32CH(o/p)7.177.207.187.027.307.16CH(

4、m)7.257.207.257.137.307.16氯仿7.268.028.326.157.587.90环己烷1.431.431.401.401.441.451,2-二氯甲烷3.733.873.902.903.813.78二氯甲烷5.305.635.764.275.445.49乙醚CH3(t)1.211.111.091.111.121.181.17CH2(q)3.483.413.383.263.423.493.56二甲基甲酰胺CH8.027.967.957.637.927.797.92CH32.962.942.892.362.892.993.01CH32.882.782.731.862.772.862.85二甲基亚砜2.622.522.541.682.502.652.71二氧杂环3.713.593.573.353.603.663.75测试核磁时,所用溶剂分子中的氢都应被氘取代,但难免有残余,这样就会产生溶剂峰;除了残存的 质子峰外,溶剂中有时会有微量的H2O而产生水峰,而且这个H2O峰的位置也会因溶剂的不同而不同; 另外,在样品(或制备过程)中,也难免会残留一些杂质,在图谱上就会有杂质峰,应注意识别。

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