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Molecular orbital study of hyperfine splitting constants in ethyl and cyclohexadienyl radicals

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Abstract

Hyperconjugated models are used for a m.o. calculation of proton h.f.s. constants in Ethyl and Cyclohexadienyl radicals. A slightly modified Pariser-Parr-Pople SCF method is employed including extensive configuration interaction. The calculated spin densities for the hyperconjugated protons are in good agreement with experiment.

Zusammenfassung

Zur Berechnung von Protonenhyperfeinstrukturkonstanten von Äthyl- und Cyclohexadienyl-Radikalen werden Modelle mit Hyperkonjugation verwendet. Die Rechnung gründet sich auf eine leicht modifizierte Pariser-Parr-Pople-Methode einschließlich ausgedehnter Konfigurationswechselwirkung. Die berechneten Spin-Dichten für die hyperkonjugierten Protonen stimmen mit experimentell ermittelten Werten gut überein.

Résumé

Des modèles tenant compte à la hyperconjugaison sont usés pour le calcul des constantes de structure hyperfine protonique des radicaux éthyl et Cyclohexadiényl. Le calcul se base sur une méthode Pariser-Parr-Pople un peu modifiée et comprenant une interaction de configurations extensive. Les densités de spin calculées pour les protons hyperconjugués sont en bon accord avec des valeurs expérimentales.

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Additional information

We thank the Italian National Research Council (Chemistry Committee, Research Group IV) for financial support. One of us (P.L.N.) thanks Sicedison S.p.A. for a grant.

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Nordio, P., Pavan, M.V. & Giacometti, G. Molecular orbital study of hyperfine splitting constants in ethyl and cyclohexadienyl radicals. Theoret. Chim. Acta 1, 302–307 (1963). https://doi.org/10.1007/BF00528761

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  • DOI: https://doi.org/10.1007/BF00528761

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