Reactions of MA with Free Radicals

The reaction of MA with free radicals can find a place at a number of places in this book. Since during the radical-catalyzed polymerization such a process occurs, the major segment of these types of reactions are naturally covered in the polymerization section. However, above and beyond the polymer aspects of the reactions, some reactions are known which add radicals to The double bond of MA to give monomeric products. Since some of these radical generating processes have been photoinitiated, it is suitable to discuss them as a part of this section. 

Conant and Chow, on refluxing a benzene solution of hexaphenyl-ethane and maleic anhydride, under N2, obtained a 25% yield of the adduct 57 (isolated as acid). 

Triphenylmethyl radicals, which are viewed responsible for the product formation, are known to form upon heating of hexaphenylethane. 

Hexaphenyllead has similarly been reported to add across the MA double bond/  

Binapfl obtained benzylsuccinic anhydride 59 on heating a solution of maleic anhydride in toluene at 305-315°C for 20 min/ The reaction was 

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