3-bromo-3-ethylpentene is treat with HBr what main product does it yield?
To determine the main product when 3-bromo-3-ethylpentene is treated with HBr, we need to consider the nature of the reaction, which is known as an electrophilic addition reaction.
In this specific case, the reaction involves the addition of HBr across the carbon-carbon double bond of 3-bromo-3-ethylpentene. The HBr molecule acts as the electrophile, attacking the double bond, and forming a new bond with one of the carbon atoms from the double bond.
To determine the specific product, we need to analyze the reaction mechanism and identify the more stable carbocation intermediate formed during the reaction:
1. The initial step involves the protonation of the alkene double bond by HBr. This results in the formation of a carbocation intermediate.
2. The bromide ion then attacks the carbocation, resulting in the addition of the bromine atom to one of the carbon atoms from the double bond.
3. A secondary carbocation (3°) is more stable than a primary (1°) or a methyl (0°) carbocation. Therefore, the bromide ion will likely attack the less substituted carbon atom of the double bond, forming the more stable 3° carbocation intermediate.
4. Finally, a bromide ion (Br-) acts as a nucleophile and attacks the 3° carbocation, resulting in the formation of the main product.
Considering the above steps, the main product obtained from the reaction of 3-bromo-3-ethylpentene with HBr will be 3-bromo-3-ethylpentane, where the bromine atom will be added to the less substituted carbon atom of the double bond.