Give the major product of the following reaction:
3, 3-dimethyl-1-butene + HCl → Major

• A. 2-chloro-3,3-dimethyl butane
• B. 2-chloro-2,3-dimethyl butane
• C. 1,2-dichloro-3,3-dimethylbutane
• D. 1-chloro-3,3-dimethylbutane

The reaction between 3,3-dimethyl-1-butene and HCl involves the addition of hydrochloric acid across the double bond of the alkene. In this case, the major product is determined by the stability of the carbocation that forms during the reaction.

Identifying the Major Product

When HCl adds to 3,3-dimethyl-1-butene, the more stable carbocation is formed at the more substituted carbon. This leads to the formation of:

• 2-chloro-2,3-dimethylbutane (Option B)

This product is favored due to the stability of the tertiary carbocation that forms during the reaction. Therefore, the correct answer is:

Final Answer

B. 2-chloro-2,3-dimethylbutane