熟妇人妻一区二区三区四区,久久ER99热精品一区二区,真实的国产乱XXXX在线,性XXXX18精品A片一区二区

關注公眾號

關注公眾號

手機掃碼查看

手機查看

喜歡作者

打賞方式

微信支付微信支付
支付寶支付支付寶支付
×

氫譜中的溶劑峰對照表

2023.1.04

在核磁共振(NMR)氫譜分析中,了解常見溶劑和雜質的化學位移對于正確解析譜圖至關重要。以下表格列出了一些常用的氘代溶劑以及可能遇到的雜質在氫譜中的化學位移值。



溶劑 CDCl3(CD3)2CO(CD3)2SOC6D6CD3CNCD3OHD2O
溶劑峰7.262.052.497.161.943.314.8
水峰1.562.843.330.42.134.87
乙酸2.11.961.911.551.961.992.08
丙酮2.172.092.091.552.082.152.22
乙腈2.12.052.071.551.962.032.06
7.367.367.377.157.377.33
叔丁醇CH31.281.181.111.051.161.41.24
OH4.191.552.18
乙醇CH3(t)1.251.121.060.961.121.191.17
CH2(q)3.723.573.443.343.543.63.65
OH(s)1.323.393.632.47
乙酸乙酯CH3CO2.051.971.991.651.972.012.07
OCH2(q)4.124.054.033.894.064.094.14
CH3(t)1.261.21.170.921.21.241.24
乙二醇3.763.283.343.413.513.593.65
正己烷CH3(t)0.880.880.860.890.890.9
CH2(m)1.261.281.251.241.281.29
甲醇CH33.493.313.163.073.283.343.34
OH1.093.124.012.16
正戊烷CH3(t)0.880.880.860.870.890.9
CH2(m)1.271.271.271.231.291.29
異丙醇CH3(d)1.221.11.040.951.091.51.17
CH4.043.93.783.673.873.924.02
四氫呋喃CH21.851.791.761.41.81.871.88
CH2O3.763.633.63.573.643.713.74
甲苯CH32.362.322.32.112.332.32
CH(o/p)7.177.27.187.027.37.16
CH(m)7.257.27.257.137.37.16
氯仿7.268.028.326.157.587.9
環己烷1.431.431.41.41.441.45
1,2-二氯甲烷3.733.873.92.93.813.78
二氯甲烷5.35.635.764.275.445.49
乙醚CH3(t)1.211.111.091.111.121.181.17
CH2(q)3.483.413.383.263.423.493.56
二甲基甲酰胺CH8.027.967.957.637.927.797.92
CH32.962.942.892.362.892.993.01
CH32.882.782.731.862.772.862.85
二甲基亞砜2.622.522.541.682.52.652.71
二氧雜環3.713.593.573.353.63.663.75


? ?image.png

簡單的氫譜來自于含有樣本的溶液。為了避免溶劑中的質子的干擾,制備樣本時通常使用氘代溶劑(氘=2H, 通常用D表示),例如:氘代水D2O,氘代丙酮(CD3)2CO,氘代甲醇CD3OD,氘代二甲亞砜(CD3)2SO和氘代氯仿CDCl3。同時,一些不含氫的溶劑,例如四氯化碳CCl4和二硫化碳CS2,也可被用于制備測試樣品。



推薦
關閉