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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 21, Number 1
BKCSDE 21(1)
January 20, 2000 

Substituted Phenyl 2-Thiophenecarboxylates and Benzoates: Synthesis, NMR Spectra, and Aromaticity Index
Chang Kiu Lee, * Ji Sook Yu, Jong Seok Park
A series of m-, and p-substituted phenyl 2-thiophenecarboxylates and benzoates was prepared by the reaction of the corresponding acyl chlorides and phenols. Their 1 H and 13 C NMR chemical shifts were analyzed using single substituent parameter (SSP) and dual substituent parameter (DSP) methods. The relative aromaticity index of thiophene was estimated to be 0.92 from the plot of the chemical shift of the carbonyl carbons of the thienoyl esters against chemical shift of the carbonyl carbons of the benzoyl esters.
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