Question
(A) CH3−C|CH3H−CH2−CH2−OH(B) CH3−OH|C|CH3−CH2−CH3(C) CH3CH3|CH−OH|CH−CH3The order of given alkanols A,B,C in their reactivity towards acid catalysed dehydration is:
(A) CH3−C|CH3H−CH2−CH2−OH
(B) CH3−OH|C|CH3−CH2−CH3
(C) CH3CH3|CH−OH|CH−CH3
The order of given alkanols A,B,C in their reactivity towards acid catalysed dehydration is:Open in App
Solution
The correct option is C B>C>A
Carbocation formed during reaction are referred to the image above: Therefore stability of carbocations have the order 3degree>2degree>1degree and CH3 is + group so, the order of stability is :B>C>A(B) CH3−OH|C|CH3−CH2−CH3→CH3−⊕|C|CH3−CH2−CH3 (2o)(C) CH3−CH3|CH−OH|CH−CH3→CH3−C|CH3−Ch⊕−CH3CH3(2o)
Carbocation formed during reaction are referred to the image above:
Therefore stability of carbocations have the order 3degree>2degree>1degree and CH3 is + group so, the order of stability is :B>C>A
(B) CH3−OH|C|CH3−CH2−CH3→CH3−⊕|C|CH3−CH2−CH3 (2o)
(C) CH3−CH3|CH−OH|CH−CH3→CH3−C|CH3−Ch⊕−CH3CH3(2o)
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