Abstract
The 364 nm photoelectron spectra of the dehydrobenzoquinone (1•-) and benzoquinonide (2-) anions are reported. For 1•-, the unambiguous assignment of the origin peak yields an electron affinity (EA) of 1.859 ± 0.005 eV. Several vibrational modes of 1 are also reported. Another minor feature at higher electron binding energy is also observed in the spectrum of 1•-. This band does not contain any resolvable peaks and only the vertical detachment energy could be obtained. This is the first time dehydrobenzoquinone, the benzyne analogue of p-benzoquinone, is observed and characterized. The photoelectron spectrum of 2- shows no resolvable structure. The origin peak could not be assigned unequivocally because of the small Franck−Condon factor for the 0−0 transition, but an upper value of 2.18 eV for the EA of 2 was obtained. Ab initio calculations are used to help in the interpretation of the spectra and the results are utilized to simulate them.
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.
