Propagation steps autooxidation

Light during processing, handling, and use. Typically are radical scavengers which interrupt the chain propagation steps of polymer autooxidation Absorb UV light to prevent photooxidation Tinuvin 327, 328, 384, 440, etc. (derivatives of... 

Although peroxy radicals have many possible routes of reaction (see Section 4.B.2 for a brief summary of some of these), in autooxidation the most significant propagation step is a hydrogen abstraction. 

Draw the propagation steps that achieve the autooxidation of diethyl ether to form a hydroperoxide ... 

A very striking example is provided by autooxidation. Autooxidation is a radical chain oxidation of alkyl derivatives RH by oxygen to hydroperoxides ROOH, involving the following propagation steps ... 

The final step is undoubtedly a typical radical chain autooxidation (p. 274), involving the propagation steps... 

As seen in Mechanism 11.2, autooxidation is believed to occur via two propagation steps. The first is a coupling step, and the second is a hydrogen abstraction, as shown here ... 

Autooxidation. Liquid-phase oxidation of hydrocarbons, alcohols, and aldehydes by oxygen produces chemiluminescence in quantum yields of 10 to 10 ° ein/mol (128—130). Although the efficiency is low, the chemiluminescent reaction is important because it provides an easy tool for study of the kinetics and properties of autooxidation reactions including industrially important processes (128,131). The light is derived from combination of peroxyl radicals (132), which are primarily responsible for the propagation and termination of the autooxidation chain reaction. The chemiluminescent termination step for secondary peroxy radicals is as follows ... 

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