Free radical studies by resonance Raman spectroscopy. Part 2.—Diazabicyclo-octane radical cation

Abstract

The short-lived free radical cation of diazabicyclooctane has been studied in aqueous solution by resonance Raman spectroscopy. The radical was produced at ∼10^–4 mol dm^–3 concentration by chemical oxidation of the parent compound in a continous flow apparatus. The spectra of both parent and radical have been interpreted in detail through normal coordinate and molecular orbital calculations. These indicate that weaking of the C—C bonds results from electron removal, with a lesser increase in the C—N bond strengths. Evidence for strong solvent effects is presented.