| Autor: |
Zi-hao WANG, He XU, Tao WANG, Shan-zhong YANG, Yun-sheng DING, Hai-bing WEI |
| Jazyk: |
čínština |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Chinese Journal of Magnetic Resonance, Vol 38, Iss 3, Pp 323-335 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1000-4556 |
| DOI: |
10.11938/cjmr20202880 |
| Popis: |
The 1H NMR spectra of C-2 monosubstituted norbornene and its derivatives are usually difficult to assign due to the anisotropy effect of norbornene ring and being a mixture of exo- and endo- isomers. Based on the preparation of configurationally pure C-2 substituted norbornene derivatives, this study assigned the 1H and 13C NMR signals of exo-5-norbornene-2-carboxylic acid, endo-5-norbornene-2-carboxylic acid, exo-5-norbornene-2-methanol and endo-5-norbornene-2-methanol by combined use of 1H NMR, DEPT135, 1H-1H COSY, 1H-13C HMQC and 1H-1H NOESY spectroscopy, and corresponding coupling constants. The effects of norbornene derivatives' C-2 substituents and their configurations on 1H NMR chemical shifts of the compunds were also investigated. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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