What is the major product of the addition of HBr to 2-pentene?
Practice Questions
Q1
What is the major product of the addition of HBr to 2-pentene?
1-bromopentane
2-bromopentane
3-bromopentane
No reaction
Questions & Step-by-Step Solutions
What is the major product of the addition of HBr to 2-pentene?
Step 1: Identify the structure of 2-pentene. It is a five-carbon alkene with a double bond between the second and third carbon atoms.
Step 2: Understand that HBr is an acid that can add across the double bond of the alkene.
Step 3: Apply Markovnikov's rule, which states that when HBr adds to an alkene, the hydrogen (H) will attach to the carbon with the most hydrogen atoms already (the less substituted carbon).
Step 4: In 2-pentene, the double bond is between C2 and C3. C2 has one hydrogen, and C3 has two hydrogens. According to Markovnikov's rule, H will attach to C2.
Step 5: The Br will then attach to C3, which is the more substituted carbon.
Step 6: The major product formed is 2-bromopentane, where Br is attached to C3 and H is attached to C2.
