Marcus, R. A. and Darwent, B. deB. and Steacie, E. W. R. (1948) The mercury photosensitized reaction of dimethyl ether. Journal of Chemical Physics, 16 (10). pp. 987-993. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:MARjcp48
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The mercury photosensitized reaction of dimethyl ether has been investigated at pressures between 28 and 500 mm and at temperatures between 25°C and 292°C. At 25°C the products consist almost entirely of hydrogen and 1,2-dimethoxyethane, and the initial step has been shown to be the abstraction of a hydrogen atom.At higher temperatures CH2O, CH4, C2H6 and probably CH3OC2H5 become important products. They are derived from the decomposition of the methoxy methyl radical followed by subsequent radical recombination reactions. Carbon monoxide is produced in the later stages from the decomposition of formaldehyde.By varying the light intensity and pressure it has been shown that ethane and dimethoxyethane are produced by second order recombination of methyl and methoxy methyl radicals respectively. The activation energies of the following reactions have been estimated: CH3+CH3OCH3→CH4+CH3OCH2 E=9.0 kcal. CH3OCH2→CH3+CH2O E=19 kcal., the only assumption being that methyl and methoxy methyl radicals recombine with zero activation energy.
|Additional Information:||© 1948 American Institute of Physics. Received June 1, 1948. We are indebted to Dr. L. Marion of this Laboratory for the C:H analyses.|
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|Deposited By:||Tony Diaz|
|Deposited On:||14 Aug 2008 03:51|
|Last Modified:||26 Dec 2012 10:13|
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