title: Probing intramolecular CH-π interactions in o-quinodimethane adducts of [60]fullerene using variable temperature NMR.
abstract: Several o-quinodimethane adducts of [60]fullerene were synthesized and their intramolecular aryl CH-fullerene π interactions were studied using variable temperature-NMR (VT-NMR). Evaluation of the rate constants associated with the first-order transition states for cyclohexene boat-to-boat inversions enables quantification of ΔG(‡) values for each inversion. A comparison between two constitutional isomers, only one of which is capable of intramolecular CH-π interactions, provides a lower limit of 0.95 kcal/mol for each aryl CH-fullerene π interaction.
authors.affiliation: Department of Chemistry and Materials Science Program, University of New Hampshire, 23 Academic Way, Durham, New Hampshire 03824, USA.
authors.forename: Ryan P
authors.initials: RP
authors.lastname: Kopreski
authors.forename: Jonathan B
authors.initials: JB
authors.lastname: Briggs
authors.forename: Weimin
authors.initials: W
authors.lastname: Lin
authors.forename: Mikaël
authors.initials: M
authors.lastname: Jazdzyk
authors.forename: Glen P
authors.initials: GP
authors.lastname: Miller