Journal
JOURNAL OF HETEROCYCLIC CHEMISTRY
Volume 39, Issue 6, Pages 1207-1217Publisher
HETERO CORPORATION
DOI: 10.1002/jhet.5570390615
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A series of m- and p-substituted-phenyl benzoates, 2-thienoates, and 2-furoates were prepared and their H-1 and C-13 nmr spectroscopic characteristics were examined. In general, good correlations were observed between the chemical shift values of protons and carbons of the acyl aromatic rings and the Hammett sigma. Plots of the chemical shift values of the carbonyl carbons of the benzoates against those of the 2-thienoates and 2-furoates gave an excellent correlation and the values of the slopes are 0.85 and 0.75, respectively, in dimethyl sulfoxide-d(6) and 0.90 and 0.78, respectively, in chloroform-d. The values could be considered as a set of aromaticity indices.
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