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The Cadmium-photosensitized Decomposition of Acetone

The Cadmium-photosensitized Decomposition of Acetone The cadmium-photosensitized decomposition of acetone has been studied and compared with the 3261 Å direct photolysis at 270±1°C. The data could be consistently explained by the following reaction mechanism:& Cd(^3P_1)+CH_3COCH_3→Cd+^3A^*\labeleq1& ^3A^*→2CH_3+CO\labeleq2& CH_3+CH_3COCH_3→CH_4+CH_3COCH_2\labeleq3& 2CH_3→C_2H_6\labeleq4& CH_3+CH_3COCH_2→C_2H_5COCH_3\labeleq5& 2CH_3COCH_3→(CH_3COCH_2)_2\labeleq6The mechanism from (2) to (6) is exactly the same as that proposed for the 3130 Å direct photolysis at temperatures higher than 100°C. By using the cis-trans isomerization of 2-butene as the actinometer, the quantum yield of the photosensitized decomposition of acetone was estimated to be 0.3. Kinetic analysis showed that the energy-rich ethane produced by the recombination reaction (4) has the lifetime of 2×10−8 sec at 270°C. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the Chemical Society of Japan Oxford University Press

The Cadmium-photosensitized Decomposition of Acetone

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References (7)

Publisher
Oxford University Press
Copyright
© 1970 The Chemical Society of Japan
ISSN
0009-2673
eISSN
1348-0634
DOI
10.1246/bcsj.43.1319
Publisher site
See Article on Publisher Site

Abstract

The cadmium-photosensitized decomposition of acetone has been studied and compared with the 3261 Å direct photolysis at 270±1°C. The data could be consistently explained by the following reaction mechanism:& Cd(^3P_1)+CH_3COCH_3→Cd+^3A^*\labeleq1& ^3A^*→2CH_3+CO\labeleq2& CH_3+CH_3COCH_3→CH_4+CH_3COCH_2\labeleq3& 2CH_3→C_2H_6\labeleq4& CH_3+CH_3COCH_2→C_2H_5COCH_3\labeleq5& 2CH_3COCH_3→(CH_3COCH_2)_2\labeleq6The mechanism from (2) to (6) is exactly the same as that proposed for the 3130 Å direct photolysis at temperatures higher than 100°C. By using the cis-trans isomerization of 2-butene as the actinometer, the quantum yield of the photosensitized decomposition of acetone was estimated to be 0.3. Kinetic analysis showed that the energy-rich ethane produced by the recombination reaction (4) has the lifetime of 2×10−8 sec at 270°C.

Journal

Bulletin of the Chemical Society of Japan – Oxford University Press

Published: Mar 27, 2006

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