Photochemical and hot H atom reactions of acetaldehyde
Journal Article
·
· J. Phys. Chem.; (United States)
Photolysis and hot hydrogen atom reactions of acetaldehyde have been studied simultaneously not only with a cadmium but also with a zinc resonance lamp as the light source. Contrary to previous results, new products (acetone, ethanol, 2-propanol, ethyl acetoacetate, and diacetone alcohol) are identified in the photolysis of acetaldehyde. On the other hand, the principal products in decreasing order from the hot atom reaction with acetaldehyde have been established to be hydrogen, biacetyl, methane, carbon monoxide, and ethanol, whereas acetone and ethylene existed as minor products. A study of product quantum yields at 214 nm vs. various (CH/sub 3/CHO)/(CH/sub 2/S) ratios are reported. The formation of several unexpected products in these studies strongly suggested that the aldehyde functional group of acetaldehyde has an unsaturated character relative to the addition of both hydrogen atoms and methyl radicals. This latter new observation and accompanying mechanisms are discussed. 2 figures, 6 tables.
- Research Organization:
- Univ. of Houston, TX
- OSTI ID:
- 6057878
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 83:15; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500 -- Photochemistry
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
ACETALDEHYDE
ACETONE
ALCOHOLS
ALDEHYDES
ALKANES
ALKENES
ALKYL RADICALS
CADMIUM
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CRYOGENIC FLUIDS
DECOMPOSITION
ELEMENTS
ETHANOL
ETHYLENE
FLUIDS
HOT ATOM CHEMISTRY
HYDROCARBONS
HYDROGEN
HYDROXY COMPOUNDS
KETONES
METALS
METHANE
METHYL RADICALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
RADIOCHEMISTRY
ZINC
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500 -- Photochemistry
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
ACETALDEHYDE
ACETONE
ALCOHOLS
ALDEHYDES
ALKANES
ALKENES
ALKYL RADICALS
CADMIUM
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CRYOGENIC FLUIDS
DECOMPOSITION
ELEMENTS
ETHANOL
ETHYLENE
FLUIDS
HOT ATOM CHEMISTRY
HYDROCARBONS
HYDROGEN
HYDROXY COMPOUNDS
KETONES
METALS
METHANE
METHYL RADICALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
RADIOCHEMISTRY
ZINC