title: Differences in electronic properties of fluorinated and trifluoromethylated fullerenes revealed by their propensity for dianion formation.
abstract: The cross sections for electron transfer from sodium to C(60)F(n) (-) and C(60)(CF(3))(n) (-) anions in 50-keV collisions as a function of the number of functional groups n are reported. There are clear differences between derivatives of fluorine and trifluoromethyl due to the different electron withdrawing properties of F and CF(3). The role of inductive effects and pi electron delocalization on the electron affinity is discussed, assuming a correlation between the cross section and the electron affinity of the anion.
authors.affiliation: Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark. lexas@thermo.chem.msu.ru
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Streletskiy
authors.forename: Preben
authors.initials: P
authors.lastname: Hvelplund
authors.forename: Steen Brøndsted
authors.initials: SB
authors.lastname: Nielsen
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.forename: Shigeo
authors.initials: S
authors.lastname: Tomita
authors.forename: Alexey A
authors.initials: AA
authors.lastname: Goryunkov
authors.forename: Olga V
authors.initials: OV
authors.lastname: Boltalina