Anion photoelectron spectroscopy of C(5)H(-) |
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Authors: | Sheehan Sean M Parsons Bradley F Yen Terry A Furlanetto Michael R Neumark Daniel M |
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Institution: | Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, USA. |
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Abstract: | Anion photoelectron spectroscopy is performed on the C(5)H(-) species. Analogous to C(3)H(-) and C(3)D(-), photodetachment transitions are observed from multiple, energetically close-lying isomers of the anion. A linear and a cyclic structure are found to have electron binding energies of 2.421+/-0.019 eV and 2.857+/-0.028 eV, respectively. A cyclic excited state is also found to be 1.136 eV above the linear (2)Pi C(5)H ground state. Based on our assignments of the observed transitions and previous calculations on the energetics of neutral C(5)H isomers, the cyclic (1)A(1) anion state is found to lie 0.163 eV below the (3)A linear anion. |
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