EPR-Untersuchung der g-Faktoren und Chlor-Hyperfeinstrukturen von gelösten aliphatischen Radikalen
Open Access
- 1 August 1968
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 23 (8) , 1209-1213
- https://doi.org/10.1515/zna-1968-0816
Abstract
For a series of alkyl radicals we have measured the electron g factors and hfs splitting constants by EPR methods. The isotropic chlorine hfs constants are discussed in terms of the Karplus-Fraenkel formula αCl=QCCl Cl Qc. The results indicate that QCl = Δ (Cl) QC π with Δ (Cl) =0.16. From this and Fischer’s Δ (Xi) parameters for the other substituents, effective σ-π-parameters could be determined to be There exists a proportional relationship between the g factor shift ΔgCl due to chlorine substituents and Cl Σ QCl π from which ΔEn→π Cl =15.6·103 cm-1 was determined. CIKeywords
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