What is the product of the reaction between 1-butyne and HBr?

What is the product of the reaction between 1-butyne and HBr?

Step 1: Identify the reactants. We have 1-butyne, which is a type of alkyne, and HBr, which is a hydrogen halide.
Step 2: Understand the reaction type. When an alkyne reacts with HBr, it undergoes an addition reaction.
Step 3: Apply Markovnikov's rule. This rule states that when HBr adds to an alkyne, the hydrogen (H) will attach to the carbon with more hydrogen atoms already (the less substituted carbon).
Step 4: Determine the product. In 1-butyne, the first carbon (C1) has 3 hydrogens, and the second carbon (C2) has 1 hydrogen. According to Markovnikov's rule, H will attach to C1, and Br will attach to C2.
Step 5: Write the product. The product formed is 2-bromobutane, where Br is attached to the second carbon.

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