title: Antiaromaticity in open-shell cyclopropenyl to cycloheptatrienyl cations, anions, free radicals, and radical ions.
authors.affiliation: Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada.
authors.forename: A D
authors.initials: AD
authors.lastname: Allen
authors.forename: T T
authors.initials: TT
authors.lastname: Tidwell