title: Restricted rotation in 9-phenyl-anthracenes: a prediction fulfilled.
abstract: The calculated phenyl rotation barrier in 9-phenylanthracene has been reported as ~21 kcal mol(-1), but experimental verification of this barrier is limited by its intrinsic symmetry. V-T NMR indicated the barrier to interconversion of the syn (C(2v)) and anti (C(2h)) rotamers of 9,10-bis(3-fluorophenyl)anthracene to be ~21 kcal mol(-1). Likewise, the V-T NMR spectra of 9-(1-naphthyl)-10-phenylanthracene reveal that the rotational barrier of the unsubstituted phenyl ring is at least 21 kcal mol(-1).
authors.affiliation: School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland. kirill.nikitin@ucd.ie
authors.forename: Kirill
authors.initials: K
authors.lastname: Nikitin
authors.forename: Helge
authors.initials: H
authors.lastname: Müller-Bunz
authors.forename: Yannick
authors.initials: Y
authors.lastname: Ortin
authors.forename: Jimmy
authors.initials: J
authors.lastname: Muldoon
authors.forename: Michael J
authors.initials: MJ
authors.lastname: McGlinchey