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For the given four structures , I to IV,...

For the given four structures , I to IV, which of the following is correct ?
`underset((I))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(3)H_(7))` ` underset((II))(CH_(3)-overset(O)overset(P)(C)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5))``underset((III))(CH_(3)-overset(O)overset(P)(C ) -overset(C_(2)H_(5))overset(|)(C ) H -C_(2)H_(5))` `underset((IV))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5))`

A

`IV gt II gt I gt III`

B

`II gt IV gt III gt I`

C

`II gt IV gt I gt III`

D

`IV gt II gt III gt I`

Text Solution

Verified by Experts

The correct Answer is:
C
Stability of carbocations is enhanced by
(i) Presence of conjugation
(ii) Presence of groups having +I effect. So, the correct order is
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