Dipole bound and valence state coupling in argon-solvated nitromethane anions.

Examines the coupling between the dipole bound and valence electronic states of the nitromethane anion. Use of Rydberg electron spectroscopy for the study; Comparison of the solvation behavior of nitromethane anion with acetonitrile anion; Isolation of dipole bound state from the resonance arising from excess electron occupation in the molecular orbital.