Photoelectron spectroscopy from the A¹ A_u state of acetylene: The bending vibrations of C₂H₂⁺+x²Π_u

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.461570· OSTI ID:1169723

Pratt, Stephen T. ^[1]; Dehmer, Patricia M. ^[1]; Dehmer, Joseph L. ^[1]

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1. Argonne National Laboratory (ANL), Argonne, IL (United States)

Photoelectron spectra are reported for one-photon resonant, two-photon ionization of acetylene via a number of vibronic levels of the A¹ A_u state. Because the A¹ A_u state is trans bent and the x² Π_u ground state of the ion is linear, ionization from the A¹ A_u levels produces a long progression in the trans-bending vibration of the ion. The x² Π_u state is split by the Renner–Teller interaction along the trans-bending coordinate; the analysis of the photoelectron spectra allows the determination of the Renner–Teller parameters and leads to reassignments of the cis and trans-bending vibrations in earlier photoelectron studies.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 1169723
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 9 Vol. 95; ISSN JCPSA6; ISSN 0021-9606
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS