13 C NMR Chemical shifts and carbon-proton coupling constants of some furocoumarins and furochromones
โ Scribed by M.H.A. Elgamal; N.H. Elewa; E.A.M. Elkhrisy; Helmut Duddeck
- Book ID
- 108365674
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 580 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0031-9422
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## Abstract Carbonโproton and carbonโdeuteron coupling constants were measured in the isotopomers CH~2~Cl~2~, CHDCl~2~ and CD~2~Cl~2~. The primary and secondary isotope effects on the carbonโproton coupling are โ0.60 (ยฑ0.05) and โ0.25 (ยฑ0.01) Hz, respectively. The deuteriumโinduced ^13^C isotope sh