✍ Scribed by Philip J. Boon; Lorraine Harris; Myra T. Olm; Jane L. Wyatt; Martyn C.R. Symons
No coin nor oath required. For personal study only.
Espomre of dilute solutions of acetone in trichlorofluoromethane to 6oCo -r-rays at 77 R gave the radical cation, characterised only by its g-tensor components. An ENDDR study revealed the presence of two types of weakly coupled protons (A r = I.5 G. AZ = 0.3 G) in accord with INDO calculations. The ESR spectrum of acetone labeled with 13C(13CH3) has been studied and the resulting pammeters interpreted in terms of two equivalent carbon atoms. with ~22% spin density on each. This value is significantly less than that on the hydrogen atoms of the formaldehyde cation (==36W). which supports our contention that C-H hypcrconjugation is somewhat more important than C-C hyperconjugation in radical cations.
📜 SIMILAR VOLUMES
## Abstract Seven redox stages, the dication 1^2+^, the radical cation \documentclass{article}\pagestyle{empty}\begin{document}$1^{\scriptstyle {{+}\kern-4pt {.}\kern-2pt }}$\end{document}, the neutral 1, the radical anion \documentclass{article}\pagestyle{empty}\begin{document}$1^{\scriptstyle {{\
## Abstract Several methods have been established for preparing cation radicals from 1,2,4,5‐tetramethoxybenzene that allow highly resolved ESR spectra to be recorded. Precise values of the hyperfine coupling constants for the aromatic and methoxy protons have been obtained; the values are 0.2268±0