15min:

WILLIAM MCNAVAGE, MICHAEL J. WILHELM, RAYMOND R. GROLLER AND HAI-LUNG DAI, Department of Chemistry, The University of Pennsylvania, Philadelphia PA, 19104-6323, USA.

The ketenyl radical (HCCO) was generated through UV dissociation of Ethyl Ethynyl Ether (EEE), a precursor chosen for its unity quantum yield in the production of HCCO , a radical that plays an important role in the oxidation of most C2 hydrocarbons and is a major intermediate in the formation of CO and CO₂ in the troposphere. IR emission from photoproducts following the EEE precursor dissociation was detected by sub-microsecond time-resolved Fourier transform emission spectroscopy. Two previously unknown vibrational modes, the ₁ CH stretch and the ₃ symmetric CCO stretch of HCCO have been identified and will be presented. The nascent product distribution from the EEE photo-dissociation will be discussed.