The correct representation involving heterolytic fission of among the following is:
1.
2.
3.
4.
Hint: More electronegative element gets negative charge and less electronegative element gets positive charge.
In heterolytic cleavage, unequal distribution of bonding electrons take place. More electronegtive element takes bonding electrons and and acquire negative charge while less electonegative element acquire positive charge.
Arrow denotes the direction of movement of electrons
(1)
(2)
(3)
(4)
Since, Br is more electronegative than carbon, hence heterolytic fission occurs in such a way that CH3 gets the positive charge and Br gets the negative charge. Thus, option (2) is correct.
