title: Isotope effects in dipole-bound anions of acetone.
abstract: Precision measurements using the Rydberg charge-exchange and electric field-detachment methods find that the dipole-bound electron affinity (EA) of acetone (C3H6O) is 55+/-10 mueV greater than for deuterated acetone (C3D6O). The result agrees well with a theoretical prediction obtained with high-level electronic-structure and anharmonic vibrational calculations. The dipole moments calculated for the vibrationally averaged structures of C3H6O and C3D6O show that the isotope effect (2% reduction) on the EA of acetone is mainly due to a slight reduction (0.5%) of the average dipole moment upon deuteration.
authors.affiliation: Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, USA.
authors.forename: Nathan I
authors.initials: NI
authors.lastname: Hammer
authors.forename: Robert N
authors.initials: RN
authors.lastname: Compton
authors.forename: Ludwik
authors.initials: L
authors.lastname: Adamowicz
authors.forename: Stepan G
authors.initials: SG
authors.lastname: Stepanian