Organic Magnetic Resonance

The relationship between 19F substituent chemical shifts and electron densities: meta??and para??substituted benzoyl fluorides

RTC Brownlee, DJ Craik

文献索引：Brownlee, Robert T. C.; Craik, David J. Organic Magnetic Resonance, 1980 , vol. 14, # 3 p. 186 - 191

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被引用次数: 13

摘要

Abstract The 19 F substituent chemical shifts (SCS) of meta-and para-benzoyl fluorides are found to correlate well with substituent parameters using the dual substituent parameter (DSP) equation, indicating that they reflect electronic perturbations induced by the substituent. The direction of the SCS values is such that donating substituents cause upfield shifts whilst acceptors cause downfield shifts. STO-3G calculations indicate that ...