Effects of intramolecular and intermolecular proton transfer processes onto the ESR spectra of o-semiquinone radicals

✍ Scribed by K. Loth; F. Graf; Hs.H. Günthard

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 521 KB
• Volume: 45
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)85242-1

✦ Synopsis

ESR spectra of o-semiquinone radicals produced by dnect photolysis of pyrocatechol in various solvents are reported. In aprotic. neutral solvents the kinetic effects in the ESR spectra reflect the dynamics of the intramolecular hydrosen hond, %hich is superimposed by intermolecular processes in the presence of protic solvents. bases or acids.

The problem of the proton transfer equilibria involving semiquinone type radicals was first investigated in detail by Smith and Carrington [1] and later on by Dixon and Murphy [2] _ Cationic and anionic