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The decomposition of gaseous glyoxal has been investigated from 410° to 450°C. The reaction is homogeneous and first order. Considerable carbon and tar is deposited, however, and the results are erratic. The following three reactions occur to about the same extent: CHO–CHO=2 CO+H2,CHO CHO=C+CO+H2O,CHO CHO=1n (CHO–CHO)n.The results are discussed from the point of view of the occurrence of glyoxal as an intermediate in the oxidation of acetylene.
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Steacie et al. (1935) studied this question.
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