J. K. Dohrmann, W. Kieslich
Jul 1, 1978
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Influential Citations
11
Citations
Journal
Journal of Magnetic Resonance
Abstract
Abstract The electron spin resonance spectra of the transient 1-hydropyridinyl radicals produced by the photochemical reduction at room temperature of 4-acetylpyridine and pyridine-4-carbaldehyde in 2-propanoVacetone solution with a range of water content have been analyzed. The NH proton couplings were assigned by investigating the spectra of the radicals in solutions containing D 2 O. An effect of the solvent on the hyperfine couplings has been observed. The solvent effect has been treated by the Huckel-McLachlan procedure assuming that the Coulomb-integral parameter of the carbonyl oxygen atom is changed by the solvent. The result of the calculation is in agreement with the observation and leads to an assignment of the couplings.