18O??isotope effect in 13C nuclear magnetic resonance spectroscopy: 5—Substituent group electronic effects in substituted acetophenones

…, SA DeFrees, RL Van Etten

Index: Risley, John M.; DeFrees, Shawn A.; Etten, Robert L. Van Organic Magnetic Resonance, 1983 , vol. 21, # 1 p. 28 - 35

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Citation Number: 15

Abstract

Abstract A series of para-and meta-substituted acetophenones were prepared which were highly labeled with 18 O at the carbonyl function. The natural abundance 13 C NMR spectra of the compounds were recorded and the 18 O-isotope-induced shifts of the carbonyl carbon were measured in order to determine possible substituent group electronic effects on the 18 O-isotope shift. The isotope shifts were found to be correlated with a number of properties ...