The correct stability order for the foll...

The correct stability order for the following species is

`(II) gt (IV) gt (I) gt (III)`

`(I) gt (II) gt (III) gt (IV)`

`(II) gt (I) gt (IV) gt (III)`

`(I) gt (III) gt (II) gt (IV)`

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The correct Answer is:

Carbocation (I) is stabilized by +R - effect of O as well as +I -effect of two `CH_(3)` groups , carbocation (II) is stabilized by +I -effect of `CH_(3)` and `CH_(2)CH(CH_(3))_(2)` groups l carbocation (III) is stabilzes by +R effect of O and +I effect of one `CH_(3)` group while carbocation (IV) is stabilized by +I-effect of `CH_(2)CHCH(CH_(3))_(2)` group. Thus, decreasing order of stability of these carbocations is : `I gt III gt II gt IV`.

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The correct stability order for the following species is

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