Additionof HCI to 3,3 dimethyl but-1-ene yields two products, one of which has a rearranged carbon skeleton. Which of the following cations are intermediates in that reaction ?
`(CH_(3))_(3) overset(o+) underset(I) C CHCH_(2)Cl " " (CH_(3))_(3) underset(II)(C)overset(o+)CHCH_(3)`
`(CH_(3))_(2) overset(o+) underset(III)underset(Cl) underset(|) C (CH_(3))_(2) " " (CH_(3))_(2) underset(IV)overset(o+) C CH(CH_(3))_(2)`

Options

A. Both I and II
B. Both I and III
C. Both II and III
D. Both II and IV

Answer

D

Explanation

`CH_(3)-overset(CH_(3))overset(|)underset(CH_(3)) underset(|)C CH=CH_(2)overset(HCl)to CH_(3)-overset(CH_(3))overset(|)underset((II)) underset(CH_(3))underset(|)C-underset(o+)CH-CH_(3) overset("Rearrangement") toCH_(3)-overset(CH_(3))overset(|)underset(o+)C-underset((iv)) underset(CH_(3)) underset(|)(CH-CH_(3))`