Radical reactions at room temperature

This discussion of acetone is closed without going into detail concerning the various radical reactions at room temperature. Many of them must occur and the overall mechanism is believed to be well understood. Any mechanism which necessarily involves so many steps probably never could be proved to be correct in its entirety. The points we wish to emphasize are mainly that dissociation can occur in more than one way, sometimes from one electronic state and sometimes from another. The relative importances of the various steps are difficult to determine but studies of emission decay, of intermediate concentrations by flash photolysis, and of the yields of all of the products by modern methods such as chromatography and nuclear magnetic resonance permit reasonable mechanisms to be proposed. 

Table I. Rate Constants for CH Radical Reactions at Room Temperature with Selected Molecules Relevant to Hydrocarbon Combustion...

Various free radical reactions at room temperature in the presence of chiral and achiral tetrasubstituted-ammonium hypophosphites in water using 0.5 equiv of Et3B-air as radical initiator. 

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