## 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
The reactions of transition metal chelates with organometallic compounds and their paramagnetic products: IV—the anion radical of acetylacetonate
✍ Scribed by A. Staško; A. Tkáč; V. Laurinc; L. Malík
- Publisher
- John Wiley and Sons
- Year
- 1976
- Tongue
- English
- Weight
- 248 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
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 protons of acetylacetonate. The calculations of spin densities for the anion radical of acetylacetonate by the INDO method are in relatively good agreement with experiment.
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## 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
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