MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Organic ChemistryHydrocarbonsPhysical & Chemical Properties of Alkenes
In the presence of peroxide, hydrogen chloride and hydrogen iodide do not give anti-Markownikoff’s addition to alkenes because
A.both are highly ionic
B.one is oxidising and the other is reducing
C.one of the steps is endothermic in both the cases✓ Correct
D.all the steps are exothermic in both the cases
Explanation
We know that presence of peroxides, leads to formation of radicals gives Antimarkownikoff addition. But the addition of both Cl and I radical to alkenes is energetically unfavourable due to endothermic reaction conditions.
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