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Give the structures of the major organic products from 3-ethyl-2-pentene using (i) HBr in the presence of peroxide and (ii) HCl in the presence of peroxide. |
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Answer» Solution :(i) `CH_(3)CH_(2) - overset(overset(C_(2)H_(5))(|))(C )= CH-CH_(3) + HBr overset("PEROXIDE")rarr CH_(3)CH_(2)- overset(overset(C_(2)H_(5))(|))(CH)-overset(overset(BR)(|))(C )HCH_(3)` This is anti-Markovnikoff addition (ii) `CH_(3)CH_(2)- overset(overset(C_(2)H_(5))(|))(C )=CH-CH_(3) + HCl overset("Peroxide")rarr CH_(3)CH_(2)- underset(underset(Cl)(|))overset(overset(C_(2)H_(5))(|))(C )-CH_(2)CH_(3)` This is Markovnikoff addition, since peroxide EFFECT is not observed in HCl |
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