Infrared multiphoton dissociation of ethyl and methyl acetate

Journal Article · Thu Sep 22 00:00:00 EDT 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100330a013· OSTI ID:6254098

Hintsa, E J; Wodtke, A M; Lee, Y T

The collisionless decompositions of ethyl and methyl acetate was investigated with IR multiphoton dissociation. With a fluence of 40 J/cm/sup 2/, ethyl acetate gave 97% concerted decomposition producing ethylene and acetic acid, the latter of which underwent significant secondary decomposition to ketene and water. Simple bond rupture producing ethyl radical and CH/sub 3/CO/sub 2/, which completely decomposed to CH/sub 3/ and CO/sub 2/, accounted for the remaining reaction produce. Methyl acetate underwent concerted reaction to produce methanol and ketene and simple bond rupture to form CH/sub 3/ and CH/sub 3/CO/sub 2/, in near equal amounts. All of the concerted reactions released more than half (approx.20 kcal/mol) of the exit channel barrier into translational energy. From the branching ratio between the two channels and the translational energy distribution of the simple bond rupture channel, the barrier for concerted reaction in methyl acetate was determined to be 69 /plus minus/ kcal/mol.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• OSTI ID: 6254098
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:19; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ACETATES
BINDING ENERGY
CARBOXYLIC ACID SALTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
DECOMPOSITION
DISSOCIATION
ELECTROMAGNETIC RADIATION
ENERGY
EXPERIMENTAL DATA
INFORMATION
INFRARED RADIATION
LASERS
MASS SPECTROSCOPY
MEASURING INSTRUMENTS
MULTI-PHOTON PROCESSES
NUMERICAL DATA
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATIONS
SPECTROMETERS
SPECTROSCOPY
TIME-OF-FLIGHT SPECTROMETERS
YIELDS