Ring-cleavage reactions of aromatic hydrocarbons studied by FT-IR spectroscopy. III. Photooxidation of 1,2,3-, 1,2,4-, and 1,3,5-trimethylbenzenes in the NOx-air system.
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概要
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Photooxidation of 1,2,3-, 1,2,4-, and 1,3,5-trimethylbenzenes was carried out in the NO<I><SUB>x</SUB></I>–air system. Formation of glyoxal, methylglyoxal and biacetyl was observed in the cases of 1,2,3- and 1,2,4-trimethylbenzenes, and only methylglyoxal was observed from 1,3,5-trimethylbenzene. Yields of glyoxal, methylglyoxal and biacetyl were 7, 18, and 45% and 8, 37, and 11% of trimethylbenzene consumed in cases of 1,2,3- and 1,2,4-trimethylbenzenes, respectively. The reaction mechanism which was used to explain the yields of α-dicarbonyl compounds from toluene and <I>o</I>-, <I>m</I>-, <I>p</I>-xylenes in the preceding paper (part II) has been applied to explain these yields, and has been found to reproduce these yields well. Formation of 3-hexene-2,5-dione was observed only from 1,2,4-trimethylbenzene. The fractions of the ring-cleavage process in the total reaction were 70, 56, and 64% in cases of 1,2,3-, 1,2,4-, and 1,3,5-trimethylbenzenes, respectively. The yields of the ring-cleavage process are discussed.
- 公益社団法人 日本化学会の論文
著者
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Bandow Hiroshi
Division Of Atmospheric Environment The National Institute For Environmental Studies
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WASHIDA Nobuaki
Division of Atmospheric Environment, The National Institute for Environmental Studies
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