Predict the major, organic product for the following reaction.

• A.
• B.
• C.
• D.

Answer: (C)

Verified step by step guidance

1. Identify the functional group in the starting material. The structure contains an alkyne group, which is a carbon-carbon triple bond.
2. Recognize the reagents used in the reaction. The reaction involves hydrogen gas (H₂) and a palladium on carbon (Pd/C) catalyst, which is typically used for hydrogenation reactions.
3. Understand the reaction type. The presence of H₂ and Pd/C suggests a catalytic hydrogenation reaction, which will convert the alkyne to an alkane by adding hydrogen atoms across the triple bond.
4. Predict the product. In a complete hydrogenation of an alkyne, two equivalents of hydrogen are added, converting the triple bond into a single bond, resulting in an alkane.
5. Draw the major organic product. Replace the alkyne group in the starting material with a single bond, adding hydrogen atoms to each carbon that was part of the triple bond, resulting in a saturated hydrocarbon.