Q.
What is the major product expected from the following reaction ?
Where $D$ is an isotope of Hydrogen
Solution:
Formation of above species is more favourable. The stability order of carbocations is
Now, carbocation formed is $s p^{2}$ hybridised that is triangular planar as shown below
Either the $C l^{\ominus}$ attack from above or below formation of the plane of the molecule, so there is probability of resultant product as shown below i.e., both product will form



