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Tienthong Thongpanchang. The effect of the halide substituents on the NMR chemical shift of the bridgehead protons in the aromatic bicyclic structure. (). King Mongkut's University of Technology North Bangkok. Central Library. : , 2019.
The effect of the halide substituents on the NMR chemical shift of the bridgehead protons in the aromatic bicyclic structure
Name: Thanika Poonyayant
Organization :
Mahidol University. Faculty of Science
Name: Kulvadee Dolsophon
Organization :
Srinakharinwirot University. Faculty of Science
Name: Tienthong Thongpanchang
Organization :
Mahidol University. Faculty of Science
Email :
tienthong.tho@mahidol.ac.th
keyword:
Substituents
LCSH:
Halides
Abstract:
The NMR chemical shift is one of the important physical properties which can be used as a probe for chemical structures. In this work, the effect of halide substituents on the chemical shift of the bridgehead protons of the aromatic bicyclic system was investigated. The bicyclic compounds 1, 2 and 3 were synthesized via the Diels-Alder reaction of benzyne, generated in situ from the corresponding substituted anthranilic acid, with freshly distilled cyclopentadiene. The 1H and 13C NMR spectra of the synthetic materials were investigated and the chemical shifts of Ha, Hb, Hc and Hd were determined with respect to Href of the unsubstituted bicyclic system. The results showed that the bridgehead proton Ha, which located closely to the halogen atom, were more deshielded than Hb. Nevertheless, the chemical shifts of both bridgehead protons Hc and Hd in the case of bicyclic compound 3 were not significantly different. The results suggested that the low field shift of Ha was influenced by the proximity effect from the adjacent halogen atom
King Mongkut's University of Technology North Bangkok. Central Library
Address:
BANGKOK
Email:
library@kmutnb.ac.th
Created:
2019
Modified:
2019-10-10
Issued:
2019-10-10
บทความ/Article
application/pdf
BibliograpyCitation :
PACCON 2019OR60-65
eng
©copyrights King Mongkut's University of Technology North Bangkok
RightsAccess:
ใช้เวลา
0.020286 วินาที
Thanika Poonyayant
| Title | Contributor | Type |
|---|---|---|
| The effect of the halide substituents on the NMR chemical shift of the bridgehead protons in the aromatic bicyclic structure
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Thanika Poonyayant;Kulvadee Dolsophon;Tienthong Thongpanchang | บทความ/Article |
Kulvadee Dolsophon
| Title | Contributor | Type |
|---|---|---|
| The effect of the halide substituents on the NMR chemical shift of the bridgehead protons in the aromatic bicyclic structure
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Thanika Poonyayant;Kulvadee Dolsophon;Tienthong Thongpanchang | บทความ/Article |
Tienthong Thongpanchang
| Title | Contributor | Type |
|---|---|---|
| Colorimetric sensor based on rhodamine derivative-doped soy protein for the detection of copper ions in aqueous solution
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Panisa Milindanuth;Tienthong Thongpanchang;Benjamas Klaykruayat;Jiraphorn Hutakamol;Penwisa Pisitsak | บทความ/Article | |
| The effect of the halide substituents on the NMR chemical shift of the bridgehead protons in the aromatic bicyclic structure
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Thanika Poonyayant;Kulvadee Dolsophon;Tienthong Thongpanchang | บทความ/Article |