The Cadmium-photosensitized Decomposition of Acetaldehyde, Propionaldehyde, and <I>n</I>-Butyraldehyde

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概要

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• The reactions of acetaldehyde, propionaldehyde, and <I>n</I>-butyraldehyde photosensitized by cadmium (<SUP>3</SUP>P<SUB>1</SUB>) have been investigated at 270 °C. The pressure dependence of the main products, CO, RH (R=CH<SUB>3</SUB>, C<SUB>2</SUB>H<SUB>5</SUB>, and <I>n</I>-C<SUB>3</SUB>H<SUB>7</SUB>) and R<SUB>2</SUB>, was well explained by the following reaction mechanism; Cd<SUP>*</SUP>+RCHO→R+CHO+Cd or RH+CO+Cd. R+RCHO→RH+RCO, RCO→R+CO, CHO→H+CO, H+RCHO→H<SUB>2</SUB>+RCO, R+R→R<SUB>2</SUB> or RH+ Olefin. Carbon dioxide was found to be a rather good quencher for triplet cadmium atoms, and was used for estimating the relative quenching efficiencies of the three aldehydes and acetone. The values obtained were 0.16, 1.0, 1.3, 1.2, and 1.4, respectively for carbon dioxide, acetone, acetaldehyde, propionaldehyde, and <I>n</I>-butyraldehyde, when the efficiency of <I>cis</I>-2-butene was assumed to be unity.

• 公益社団法人 日本化学会の論文

著者

• Tsunashima Shigeru

  Department of Applied Physics, Tokyo Institute of Technology

• Yamamoto Koji

  Department of Cardiology, Nagoya City University Medical School

• Sato Shin

  Department of Applied Physics, Tokyo Institute of Technology

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