Bulletin of the Chemical Society of Japan p. 2157 - 2162 (1985)
Update date:2022-08-16
Topics:
Hatakeyama, Shiro
Honda, Shigeo
Washida, Nobuaki
Akimoto, Hajime
Rate constants for reactions of OH radicals with four kinds of simple ketenes (ketene, methylketene: MK, ethyketene: EK, and dimethylketene: DMK) were measured in 1 atm of air at 299 +/- 2K by use of a competitive reaction method.The photolysis of CH3ONO in air was used to generate OH radicals.The rate constants for OH reactions obtained are (1.8+/-0.2)x10-11, (7.6+/-1.4)x10-11, (11+/-3)x10-11 and (10+/-3)x10-11 cm3 molecule-1s-1 for ketene, MK, and DMK, respectively.The major product was a carbonyl compound; HCHO from ketene, CH3CHO from MK, and CH3COCH3 from DMK; the yield was cca. 80percent, 72+/-17percent, and 70+/-3percent respectively.t is proposed that the reaction proceeded mainly via an OH addition to the olefinic carbons of ketenes and the adduct decomposes to give a carbonyl compound and CO as final products in air.
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