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17O NMR spectra of 2-substituted and 2,5-di-substituted furans. The inapplicability of the hammett LFER to correlate chemical shifts

✍ Scribed by Edward L. Clennan; M. E. Mehrsheikh-Mohammadi


Book ID
102527895
Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
222 KB
Volume
23
Category
Article
ISSN
0749-1581

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✦ Synopsis


The "0 NMR spectra of 27 2-substituted and 2,5-disubstituted furans are reported. The additivity of the "0 chemical shifts but the inapplicability of Hammett substituent constants to predict the observed shifts is demonstrated.


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1 7 0 chemical shift substitution parameters obtained previously from the investigation of the conformationally rigid 1,6-anhydro-/?-~-hexopyranoses were applied to five a,/?-D-hexopyranoses: allose, glucose, mannose, gulose and galactose. The "0 chemical shifts predicted for the endocyclic ether ox