Markovnikov’s Rule:-
When a protic acid (HX) is added to an asymmetric alkene, the acidic
hydrogen attaches itself to the carbon having a greater number of hydrogen
substituents whereas the halide group attaches itself to the carbon atom which
has a greater number of alkyl substituents.
In general – “Hydrogen is added to the carbon with the
most hydrogens and the halide is added to the carbon with least hydrogens”.
Mechanism
of Markovnikov’s Rule:-
mechanism progress in two step
[A]
STEP :-I Formation of carbocation
The protonation on the alkene, and formation of a secondary carbocation. beacuse the secondary carbocation is more stable than primary
[B] STEP II :- The halide ion nucleophile now attacks on the carbocation. This reaction yields the alkyl halide. 2-chloropropane as illustrated below.
