Long range coupling involving alkoxy protons in vinyl ethers
โ Scribed by J. Feeney; L.H. Sutcliffe
- Book ID
- 113371978
- Publisher
- Elsevier Science
- Year
- 1968
- Tongue
- English
- Weight
- 114 KB
- Volume
- 24
- Category
- Article
- ISSN
- 1386-1425
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๐ SIMILAR VOLUMES
An equation is formulated on the basis of theoretical INDOIFPI' calculations which describes the angular dependence of the propanic long-range coupling constant 4 J ~, H in substituted HCCCH, fragments. This equation is a truncated Fourier series in the torsion angle 6, HCCMe, which takes into acco
Long-range coupling between protons separated by four or more bonds has recently been observed for a number of compounds' and it appears that a near pl-zig-sag arrangement of the atoms concerned Is required. 2'3 We report here observation of coupling between the C-l and C-3 protons in isoquinollne R
## Abstract Longโrange ^13^C,H NMR coupling constants were measured in strychnine at 400 MHz by a method that employs selective excitation of individual ^13^C sites under decoupled conditions followed by polarization transfer to protons. The sensitivity was improved by performing eight simultaneous
## Abstract Carbonโ13 NMR spectra of pyridine have been observed by using the slow scan technique in the absorption mode. The long range coupling constants between carbonโ13 and protons have been obtained and assigned by the isotope substitution method.