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Deuterium isotope effects on the 13C nuclear shielding of intramolecularly hydrogen-bonded systems

✍ Scribed by Poul Erik Hansen


Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
934 KB
Volume
24
Category
Article
ISSN
0749-1581

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## Abstract A series of intramolecularly hydrogen‐bonded enamines, enols and enethiols with ester carbonylic, ketonic carbonylic, thioester carbonylic, nitro and sulphoxide acceptors were investigated to obtain ^13^C chemical shifts and deuterium isotope effects. Results from 33 new compounds and s

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The 'H and "C NMR spectra of 9-bydroxyphenalenone (1) and 9-hydroxy-2-methylpbnalenone (2) have been completely assigned. Primary and secondary deuterium isotope effects were determined in three solvents (chloroform, acetone and dimethyl sulphoxide), including the effect of temperature on t b second

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## Abstract Large deuterium isotope effects of both signs have been observed on the ^13^C nuclear shielding in proton‐chelating tautomeric forms of β‐thioxoketones, and small isotope effects of both signs have been found in related forms of Schiff's bases of salicylaldehydes. These effects are inte