Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 30, Pages 8764-8767Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201503423
Keywords
anions; diradicals; electronic structure; photoelectron spectroscopy; transient molecules
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Funding
- U.S. National Science Foundation [CHE-1266152]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1266152] Funding Source: National Science Foundation
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The long sought-after, intrinsically short-lived molecule ethylenedione (OCCO) was observed and investigated by anion photoelectron spectroscopy. The adiabatic electron affinity of its quasi-bound (3)sigma(-)(g) state is 1.936(8)eV. The vibrational progression with a 417(15)cm(-1) frequency observed within the triplet band corresponds to a trans-bending mode. Several dissociative singlet states are also observed, corresponding to two components of the (1)(g) state and the (1)sigma(+)(g) state. The experimental results are in agreement with theoretical predictions and constitute the first spectroscopic observation and characterization of this elusive compound.
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