title: Spontaneous racemization and epimerization behavior in solution of chiral nitroxides.
abstract: [reaction: see text] Enantiomerically enriched samples of chiral cyclic nitroxides with a 4-hydroxyphenyl group on the stereogenic center bearing the NO radical group undergo unprecedented spontaneous racemization and/or epimerization in aprotic solvents, which can be well accounted for by the multistep equilibrations involving planar quinoid intermediates.
authors.affiliation: Graduate School of Global Environmental Studies and Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan.
authors.forename: Naohiko
authors.initials: N
authors.lastname: Ikuma
authors.forename: Hirohito
authors.initials: H
authors.lastname: Tsue
authors.forename: Naoko
authors.initials: N
authors.lastname: Tsue
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shimono
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Uchida
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Masaki
authors.forename: Nagahisa
authors.initials: N
authors.lastname: Matsuoka
authors.forename: Rui
authors.initials: R
authors.lastname: Tamura