What is the major product of the reaction of 2-pentene with HBr?
Practice Questions
Q1
What is the major product of the reaction of 2-pentene with HBr?
1-bromopentane
2-bromopentane
3-bromopentane
bromopentane
Questions & Step-by-Step Solutions
What is the major product of the reaction of 2-pentene with HBr?
Step 1: Identify the structure of 2-pentene. It is an alkene with a double bond between the second and third carbon atoms.
Step 2: Understand that HBr is a hydrogen halide that can add across the double bond of the alkene.
Step 3: Apply Markovnikov's rule, which states that when HX (like HBr) adds to an alkene, the hydrogen atom will attach to the carbon with more 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.
Step 5: According to Markovnikov's rule, the hydrogen from HBr will attach to C2, and the bromine (Br) will attach to C3.
Step 6: This results in the formation of 2-bromopentane as the major product.
