## Abstract Long‐range deuterium isotope effects on ^13^C chemical shifts, ^__n__^ΔC(OD), were studied in the intramolecularly hydrogen‐bonded purpurogallins (benzotropolones). A very large long‐range isotope effect from the hydrogenbonded 4‐OH(D) is observed over six bonds at C‐7. Further, long‐ra
Long-range deuterium isotope effects on 1H chemical shifts in some simple organometallic compounds
✍ Scribed by Yong-Cheng Wei; Peter R. Wells; Lynette K. Lambert
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 407 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Proton NMR spectra are reported for chlorotrimethylstannane, tetramethylstannane, tetramethylplumbane and dimethylmercury containing various combinations of CH, and CD, groups. Additive long-range isotope effects on chemical shifts, 4AH(D), are observed to result in increased shielding of essentially the same magnitude in each case. There appears to be no significant isotope effect on the 'J coupling constant.
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