title: Dual association modes of the 2,5,8-tris(pentafluorophenyl)phenalenyl radical.
abstract: The 2,5,8-tris(pentafluorophenyl)phenalenyl radical was obtained by a straightforward synthesis in 11 steps from 2,7-dibromonaphthalene. This radical crystallized as a σ dimer from a solution in MeCN and as a π-stack from a melted liquid. The π stack was not confined to dimerization, but extended into a uniform 1D stack with an interplanar distance of 3.503 Å. This unique duality in association mode arose from the thermodynamic stability of the phenalenyl moiety.
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043 (Japan), Fax: (+81) 6-6850-5387.
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Uchida
authors.forename: Yasukazu
authors.initials: Y
authors.lastname: Hirao
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kurata
authors.forename: Takashi
authors.initials: T
authors.lastname: Kubo
authors.forename: Sayaka
authors.initials: S
authors.lastname: Hatano
authors.forename: Katsuya
authors.initials: K
authors.lastname: Inoue
keywords: dimerization; hydrocarbons; pi interactions; radicals; stacking interactions