Observation of X1A1 vinylidene by photoelectron spectroscopy of the C2H2− ion |
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| Authors: | Susan M. Burnett Amy E. Stevens C.S. Feigerle W.C. Lineberger |
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| Affiliation: | Department of Chemistry, University of Colorado, and Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309, USA |
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| Abstract: | Photoelectron spectra of the vinylidene anion (C2H2?) show vibrational structure in X1A1 vinylidene up 12 kcal/ mol above the vibrational ground state. Analysis yields an EA(C2H21 A1) of 0.47 ± 0.02 eV, and frequencies for the CC stretch and HCH bend. Absence of the 3B2 state in the photoelectron spectra indicates the 1A1-3B2 splitting in vinylidene is ? 1.7 eV. |
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