Question

Complete the following reaction and provide a detailed, step-by-step mechanism for the process. Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the canvas an should start on an atom or a bond and should end on an atom, bond, or location where a new bond short.

Answer 1

Solution:- This type of reactions are electrophilic addition reactions and these takes place via the formation of an intermediate known as carbocation. The stability order for carbocations is 3 degree > 2 degree >1 degree.

So, the Major product is the one that forms via more stable carbocation. In other words we could say that these reactions obey Markovnikov's rule means the hydrogen goes to the carbon that already has more hydrogens and the halide atom goes to the carbon that has least hydrogens.

In the first step alkene attack on the H of H-Br. A carbocation intermediate and bromide ion formed in this step. In second step this bromide ion attack on the positively charged carbon of the intermediate and give the product.

The mechanism is as follows...

CHa-CH 3 (2-bromo -2-mehyfent