Correlation of para substituent carbon-13 chemical shifts in aromatic compounds using polar (inductive) and resonance constants which are identical for aliphatic and aromatic compounds
✍ Scribed by I. B. Afanas'ev; V. L. Trojanker
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 573 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
A correlation of para substituted ^13^C chemical shifts in aromatic compounds with substituent polar (inductive) and resonance constants σ* and σ^r^ of aliphatic compounds has been studied. It has been shown that the precision of the correlations obtained corresponds to that of the Swain‐Lupton and Taft two‐parameter equations, but the correlation equation used in this work seems to permit a more exact separation of the substituent effects of aromatic compounds into inductive and resonance contributions. Thus, σ* and σ^r^ substituent constants are universal parameters which can be used in a correlation analysis of the properties of both aliphatic and aromatic compounds.