Abstract
In an effort to characterize the electronic states of ethylenedione, OCCO, photoelectron-photofragment coincidence (PPC) spectroscopy was applied to measure anions at m/z 56 and 57 using a pulsed discharge of glyoxal vapor and N2O. PPC measurements at a photon energy of 3.20 eV yield photoelectron spectra in coincidence with either neutral photofragments or stable neutral products. The measurements showed that primarily stable neutral products were formed, with photoelectron spectra consistent with the oxyallyl diradical, C3H4O, and acetone enolate radical, C3H5O. The spectra were also found to have features nearly identical to those reported for OCCO and HOCCO by Sanov and co-workers. The stability of the neutral products, as well as an examination of spectra reported for the oxyallyl anion and acetone enolate show that the previous assignments of OCCO and HOCCO are in error, and are instead attributed here to the oxyallyl diradical, C3H4O, and the acetone enolate radical, C3H5O.
Original language | American English |
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Pages (from-to) | 5394-5397 |
Number of pages | 4 |
Journal | Angewandte Chemie - International Edition |
Volume | 57 |
Issue number | 19 |
DOIs | |
State | Published - 4 May 2018 |
Bibliographical note
Funding Information:This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under award numbers DE-FG03-98ER14879 (REC) and DE-FG02- 07ER15884 (JFS) and the US-Israel Bi-National Science Foundation under award number BSF-2014071.
Publisher Copyright:
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Keywords
- anions
- ethylenedione
- oxyallyl
- photoelectron spectroscopy
- quantum chemistry
- radicals