What is the major product of the reaction of 1-butyne with HBr?
Practice Questions
1 question
Q1
What is the major product of the reaction of 1-butyne with HBr?
1-bromobutane
2-bromobutane
butane
bromobenzene
The reaction of 1-butyne with HBr follows Markovnikov's rule, leading to the formation of 2-bromobutane.
Questions & Step-by-step Solutions
1 item
Q
Q: What is the major product of the reaction of 1-butyne with HBr?
Solution: The reaction of 1-butyne with HBr follows Markovnikov's rule, leading to the formation of 2-bromobutane.
Steps: 6
Step 1: Identify the reactant, which is 1-butyne. It is an alkyne with the formula C4H6.
Step 2: Recognize that HBr is a hydrogen halide that can add to alkynes.
Step 3: Apply Markovnikov's rule, which states that when HX (like HBr) adds to an unsymmetrical alkene or alkyne, the hydrogen (H) will attach to the carbon with more hydrogen atoms already attached.
Step 4: In 1-butyne, the two carbon atoms involved in the triple bond are C1 and C2. C1 has 1 hydrogen, and C2 has 0 hydrogens.
Step 5: According to Markovnikov's rule, H will attach to C2 (the carbon with more hydrogens), and Br will attach to C1.
Step 6: This results in the formation of 2-bromobutane, where Br is attached to C1 and H is added to C2.
