常見(jiàn)氘代溶劑和雜質(zhì)在氫譜中的峰

1、常用氟代溶劑和雜質(zhì)峰在1H譜中的化學(xué)位移測(cè)試核磁的樣品一般要求比較純，并且能夠溶解在笊代試劑中，這樣才能測(cè)得高分辨率的圖譜。為不干擾譜圖，所用溶劑分子中的氫都應(yīng)被氛取代，但難免有氫的殘余（1%左右），這樣就會(huì)產(chǎn)生溶劑峰；除了殘存的質(zhì)子峰外，溶劑中有時(shí)會(huì)有微量的H20而產(chǎn)生水峰，而且這個(gè)H20峰的位置也會(huì)因溶劑的不同而不同；另外，在樣品（或制備過(guò)程）中，也難免會(huì)殘留一些雜質(zhì)，在圖譜上就會(huì)有雜質(zhì)峰，應(yīng)注意識(shí)別。以下給 岀了一些常見(jiàn)溶劑峰和雜質(zhì)峰的化學(xué)位移：常用笊代溶劑和雜質(zhì)峰1H譜中的化學(xué)位移單位：ppm溶劑CDCI3(CD3)2CO(CD3)2S0)C6D6CD3CNCD3OHD2O溶劑峰7.2

2、62.052.497.161.943.314.80水峰1.562.843.330.402.134.87乙酸2.101.961.911.551.961.992.08內(nèi)酮2.172.092.091.552.082.152.22乙購(gòu)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叔基甲醸CCH31.191-13 1.111.071.141.151.21OCH33.223.133.083.043.133.203.22氯仿7.268.028.326.1

3、57.587.90環(huán)己烷1.431.431.401.401.441.45一1,2 二氯甲烷3.733.873.902.903.813.78二氯甲烷5.305.635.764.275.445.49乙讎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CH 8.027.967.957.637.927.797.92CH32.962.942.892.362.892.993.01CH32.882.782.731.862.772.862.85二甲基叩楓2.622.522.541.682.502.652.71二

4、氧雜環(huán)3.713.593.573.353.603.663.75乙醇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CH3C02.051.971.991.651.972.012.070CH2(q)4.124.054.033.894.064.094.14CH3(t)1.261.201.170.921.201.241.24甲乙酮CH3C02.142.072.071.582.062.122.19CH2(q)2.462.452.431.812.432.503.18CH

5、3(t)1.060.960.910.850.961.011.26乙二醇3.763.283.343.413.513.593.65潤(rùn)滑脂CH3(m)0.860.870.920.860.88CH2(br)1.261.291.361.271.29正己烷CH3(t)0.880.880.860.890.890.90CH2 (m)1.261.281.251.241.281.29甲醇CH33.493.313.163.073.283.343.34OH1.093.124.012.16正戊烷CH3(t)0.880.880.860.870.890.90CH2(m)1.271.271.271.231.291.29異丙醇CH3(d)1.221.101.040.951.091.501.17CH4.043.903.783.673.873.924.02硅脂0.070.130.290.080.10 四氫咲喃CH21.851.791.761.401.801.871.88CH2O甲苯3.763.633.603.573.643.713.74CH32.362.322.302.112.332.32CH (o/p)7.177.207.187.027.307.16CH (m)7.257.207.257.13