The variation of substituent resonance effects with electron demand
- 1 January 1979
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 5,p. 694-698
- https://doi.org/10.1039/p29790000694
Abstract
The Hammett substituent constants for a number of substituents have been resolved into constant inductive (σI) and variable resonance (σR) contributions. Variations in σR have been interpreted in terms of changes in the demand for π electrons made on substituents and an empirical scale of ‘electron demand’ has been set up. The relationship has been tested using reactivity data, and its applications discussed.Keywords
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