Photofragmentation of ketene to CH sub 2 ( tilde X sup 3 B sub 1 ) + CO: Dissociation rate, energy release and exit barrier height

Technical Report · Wed Feb 01 04:00:00 EST 1989

DOI:https://doi.org/10.2172/5417629· OSTI ID:5417629

Chen, I-Chia.

Ketene cooled in a supersonic free jet is photolyzed in the ultraviolet range. The appearance rate of fragment CO from triplet ketene as a function of ultraviolet photon energy is measured by vacuum ultraviolet laser-induced fluorescence. A tunneling-corrected RRKM theory is used to fit the observed dissociation rate of ketene using the ab initio vibrational frequencies of the transition state. The rotational state distributions of CO from ketene photolyzed at 1120, 190, and 30 cm{sup {minus}1} above and at 50 cm{sup {minus}1} below the top of the barrier to dissociation on the triplet surface are measured. 25 refs., 17 figs., 9 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5417629
• Report Number(s): LBL-26906; ON: DE90002463
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
DISSOCIATION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FRAGMENTATION
KETENES
KINETICS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
ROTATIONAL STATES
YIELDS