Investigations of structure and conformation. Part 6. Long-range interactions and line-width alternation for γ-proton splittings in ·CH2OCH2OCH3: temperature-dependent electron spin resonance spectra
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 1,p. 116-121
- https://doi.org/10.1039/p29770000116
Abstract
E.s.r. spectra of ·CH2OCH2OCH3 at low temperatures show line-width alternation in both the α- and the γ-proton hyperfine splitting patterns; conformational interconversion involving rotation around the Oβ–Cγ bond has an energy barrier of 19 ±2 kJ mol–1. In the radical's preferred conformation, the γ-proton splittings have opposite signs, which is understandable in terms of a combination of both hyperconjugation and through-bond spin-polarisation to spin transmission. INDO MO Calculations provide corroboration for the conformational analysis.Keywords
This publication has 0 references indexed in Scilit: