Acetonyl radical, oxidation

The formation of these products is reduced or suppressed by radical scavengers such as nitric oxide or iodine and the products of the scavenging reactions with acetonyl radicals were identified as Pyruvonitrile (formed by way of nitrosoacetone) and iodoacetone. 

In the chain photooxidation of acetone it seems inevitable that the acetonyl radical must be formed98 by hydrogen abstraction from acetone. The oxidation of acetonyl radicals has been postulated to occur by the following reactions ... 

Reactions of vinoxy and acetonyl radicals with nitric oxide... 

The vinoxy CH2CHO and 1-methylvinoxy (acetonyl) radicals are key intermediates in the mechanisms of many reactions of importance for atmospheric and combustion chemistry. The formation of vinoxy radicals has been observed in several chemical processes. They may be formed in reactions of OH radicals with ethylene oxide (C2H4O) and with acetylene (C2H2) in the presence of 02.8 They are also produced in reactions of 0(3P) atoms with alkenes and in the reactions of reactive atoms such as F or 0(3P) with acetaldehyde.164,165 The 1-methylvinoxy (acetonyl) radical CH2C(CH3)0 is considered an important intermediate in the atmospheric oxidation of acetone initiated by the OH radical.166171 Spectroscopic studies by Washida et al.164 and Williams et al.m allow estimation of the rate constant for the reaction of acetonyl with 02. 

The kinetics of the reaction of acetonyl (1-methylvinoxy) radical with nitric oxide was studied both experimentally and theoretically by Delbos et al.m Theoretical investigations were based on ab initio calculations at the G2 level of the potential energy surface of the reaction system. The profile of the potential energy surface is shown in Fig. 28. 

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