## Abstract In the reactions of alkyl‐substituted‐benzenecarboxylic and ‐2‐hydroxybenzenecarboxylic acids (ArCOOH) with alkyl‐substituted phenyl Grignard reagents (RMgX) in the presence of nickel, ketyl radicals ArCO^−^R are formed. The __para__ substituents (H, Me, Et, Isopr and __t__‐Bu) of R i
The paramagnetic species produced in the reactions of organometallic compounds XIII—the anion radicals of carboxylates
✍ Scribed by A. Staško; Ľ. Malik; E. Mat'ašova; A. Tkáč
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 218 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
In the reactions of meta‐ and para‐alkyl substituted benzoic acids with aryl Grignard reagents, in tetrahydrofuran solutions and in the presence of nickel salts, the ESR spectra of the anion radicals of carboxylates derived from the benzoic acids were observed which represent the intermediates in the formation of ketyl radicals.
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## Abstract The anion radical of acetylacetonate is formed by the reaction of nickel (II) acetylacetonate with Grignard reagents. From the two coupling constants found in the e.s.r. spectrum, the one of 2·6 G was assigned to the methine proton and the one of 12·5 G to the six equivalent methyl prot
## Abstract In the reactions of Grignard reagents and __n__‐butyllithium the presence of transition metals and complexing solvents facilitates the formation of anion radicals. High radical concentrations, observable for some days at laboratory temperature, and very well resolved e.s.r. spectra of t