Identifty the major product obtained in each of the following reactions and explain its formation.
`(CH_3)_2C=CH_2overset(ICI)to`

Explanation

`(CH_3)_2C=CH_2overset(overset(delta+)I-overset(delta-)Cl)tounderset(2-"chloro-1-iodo-2-methylpropaen")((CH_3)_2C""ClCH_2I)`
This reaction occurs according to Markownikoff's rule. Chlorine is more electronegative than iodine. So, in `overset(delta+)I-overset(delta-)Cl` molecule , the I -atom with a partial positive charge combines first with the alkene as an electrophile. Between the two carbocations `(CH_3)_2overset(oplus) C""CH_2I and (CH_3CIoverset(oplus)CH_2)` formed in the first step the first one being a `3^@` carbocation is relatively more stable.
So, it is formed more easily and readily and in the second step , it combines with `Cl^-` to give 2-chloro-1-iodo -2- methylpropane as the major product.