What is the product of the reaction of 1-butyne with HBr?
Practice Questions
Q1
What is the product of the reaction of 1-butyne with HBr?
1-bromobutane
2-bromobutane
Butane
Butyne
Questions & Step-by-Step Solutions
What is the product of the reaction of 1-butyne with HBr?
Step 1: Identify the reactant, which is 1-butyne. 1-butyne is an alkyne with the formula C4H6.
Step 2: Identify the other reactant, which is HBr (hydrobromic acid).
Step 3: Understand that when an alkyne reacts with HBr, the hydrogen (H) will add to the carbon with the most hydrogen atoms (the less substituted carbon) according to Markovnikov's rule.
Step 4: In 1-butyne, the structure is CH≡C-CH2-CH3. The terminal carbon (C1) has one hydrogen, and the second carbon (C2) has no hydrogen.
Step 5: The H from HBr will add to the terminal carbon (C1), and the Br will add to the second carbon (C2).
Step 6: This results in the formation of 2-bromobutane, which has the structure CH3-CHBr-CH2-CH3.
