13C谱氘代试剂核磁试剂化学位移表
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CIL NMR Solvent Data ChartThe 1H spectra of the residual protons and 13C spectra were obtained on a Varian Gemini 200spectrometer at 295°K. The NMR solvents used to acquire these spectra contain a maximum of 0.05% and 1.0% TMS (v/v) respectively. Since deuterium has a spin of 1, triplets arising from coupling to deuterium have the intensity ratio of 1:1:1. ‘m’ denotes a broad peak with some fine structures. It should be noted that chemical shifts can be dependent on solvent, concentration and temperature.Approximate values only, may vary with pH, concentration and temperature.Melting and boiling points are those of the corresponding unlabeled compound (except for D 2O). These temperature limits can be used as a guide to determine the useful liquid range of the solvents. Information gathered from the Merck Index – Eleventh Edition.Cambridge Isotope Laboratories, Inc.50Frontage Road, Andover, MA 01810-5413usa ph : 800.322.1174 (n.america )ph:978.749.8000fax:978.749.2768 web: email:cilsales@ (n. america )email:intlsales@ (international )S Budavari, M.J. O’Neil, A. Smith, P .E. Heckelman, The Merck Index , an Encyclopedia of Chemicals, Drugs, and Biologicals - Eleventh Edition , Merck Co., Inc. Rahway, NJ, 1989.More Solvents, More Sizes,More SolutionsNMR Solvent Storage andHandling InformationCambridge Isotope Laboratories, Inc.50Frontage Road, Andover, MA 01810-5413usa ph:800.322.1174 (n.america )ph:978.749.8000fax:978.749.2768web: email:cilsales@ (n. america )email:intlsales@ (international )04-144Please note that some packaging sizes of some solvents may require special handling not given above. The bottle or ampule packaging should be checked for further instructions.。
核磁化学位移对照表
核磁化学位移是核磁共振(NMR)的一个指标,与核磁共振信号的位置有关。
不同化学环境下的原子有不同的核磁化学位移值,其值可以与参考化合物进行比较,来确定分子结构。
下面是一些常见分子结构的核磁化学位移取值范围:
1. 甲基/氢(CH3/H):0-1.5 ppm
2. 亚甲基/氢(CH2/H):1.5-2.5 ppm
3. 亚甲基/氮(CH2/N):2.5-3.5 ppm
4. 烷基/烃基(R/H):0.5-1.5 ppm
5. 乙烷(C2H6):1.25 ppm
6. 对二甲苯(p-xylene):
7.0-7.5 ppm
7. 醛卡宾(carbene):200-400 ppm
8. 羟基(OH):4.5-5.5 ppm
9. 胺基(NH):0-4.5 ppm
10. 脱氧核糖(dioxgenated ribose):3.5 ppm
需要注意的是,不同的溶剂和温度条件下,核磁化学位移值也会有所变化。
因此,在核磁共振实验中,需要使用相同的溶剂和温度条件来进行比较。