Shamsher Mohmand, Joachim Bargon, et al.
Journal of Organic Chemistry
The ESR spectra of a series of benzoylmethyl radicals are reported which exhibit resolved hyperfine splittings from nuclei of the substituted phenyl ring. INDO/CNDO calculations show that the preferred conformation of such radicals have a twisting angle of about 45° between the plane of the phenyl ring and the plane of the carbonylmethyl fragment. Strongly electron-donating or -withdrawing para substituents are believed to render a planar conformation more likely via the admixture of p-quinoid resonance structures. © 1979 American Chemical Society.
Shamsher Mohmand, Joachim Bargon, et al.
Journal of Organic Chemistry
Gian Piero Gardini, Joachim Bargon
Journal of the Chemical Society, Chemical Communications
J. Pacansky, Joachim Bargon
JACS
Joachim Bargon, Karl-Gerhard Seifert
Tetrahedron Letters