Substituent effects on the reaction of 2-(substituted phenyl)-4,5-dihydro-4,4,5,5-tetramethylimidazol-1-oxyl 3-oxides with nitric oxide: an experimental and MNDO study
作者:Osamu Shimomura、Kazuhisa Abe、Minoru Hirota
DOI:10.1039/p29880000795
日期:——
constants of the oxygen transfer reaction of 2-(substitutedphenyl)-4,5-dihydro-4,4,5,5-tetramethylimidazol-1-oxyl3-oxides with nitricoxide have been measured by using liquid chromatography (h.p.l.c.). The Hammett ρ value (–0.37) indicates that electron-donating substituents favour the reaction. This can be explained by a mechanism which includes electron transfer to nitricoxide and can be rationalised by