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  4. The addition of HBr to an alkene in the presence of peroxide is the example of

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Q. The addition of HBr to an alkene in the presence of peroxide is the example of

CMC MedicalCMC Medical 2014

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Addition of HBr to an alkene in the presence of peroxide is the example of free radical addition reaction. $ R-O-O-R\xrightarrow{{}}2R-{{O}^{\bullet }} $ $ R-{{O}^{\bullet }}+HBr\xrightarrow{{}}R-OH+B{{r}^{\bullet }} $ $ R-CH=C{{H}_{2}}+B{{r}^{\bullet }}\xrightarrow{{}}R-\overset{\bullet }{\mathop{CH}}\,-C{{H}_{2}}Br $ $ R-\overset{\bullet }{\mathop{CH}}\,-C{{H}_{2}}Br\xrightarrow{HBr}RC{{H}_{2}}C{{H}_{2}}Br+B{{r}^{\bullet }} $ $ B{{r}^{\bullet }}+B{{r}^{\bullet }}\xrightarrow{{}}B{{r}_{2}} $