Abstract
The acetylene ion has been investigated by the zero kinetic energy photoelectron photoion coincidence technique (ZEKE-PEPICO). ZEKE-PES and ZEKE-PEPICO spectra recorded in the range of 500 meV above the IP reveal bending vibrations of the acetylene ion with low Franck-Condon factors and thus illustrate the high resolution and sensitivity of the experiment. The H loss reaction from acetylene ions has been investigated at different temperatures by measuring the breakdown curves in a ZEKE-PEPICO experiment. The shift between these breakdown curves has been analysed in terms of the difference in vibrational and rotational energy. The data show that the dissociation energy E 0( T rot) is lowered by 2 2 RΔ T with increasing temperature. This result is in agreement with the simple bond fission of a molecule which is linear in the neutral state. The dissociation energy for the H loss reaction from acetylene ions at 0 K is E 0( T rot = 0 K) = 17.360±0.005 eV referenced to neutral acetylene.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
