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13 C NMR Chemical shifts and carbon-proton coupling constants of some furocoumarins and furochromones

โœ 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 Carbonโ€“proton and carbonโ€“deuteron 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 carbonโ€“proton coupling are โˆ’0.60 (ยฑ0.05) and โˆ’0.25 (ยฑ0.01) Hz, respectively. The deuteriumโ€induced ^13^C isotope sh