Write a hydrogenation reaction of the following alkyne and name the organic product formed.

• A.
• B.
• C.
• D.

Answer: (B)

Verified step by step guidance

1. Identify the starting alkyne structure. In this case, the alkyne is 3-hexyne, which has a triple bond between the third and fourth carbon atoms in a six-carbon chain.
2. Understand the hydrogenation reaction conditions. The reaction involves adding hydrogen (H\_2) across the triple bond in the presence of a metal catalyst such as Pd, Pt, or Ni, which facilitates the addition of hydrogen atoms.
3. Write the hydrogenation reaction. The triple bond in the alkyne will be fully reduced to a single bond, converting the alkyne into an alkane. The general reaction is: \(\text{R-C} \equiv \text{C-R'} + 2H_2 \xrightarrow{\text{catalyst}} \text{R-CH}_2-\text{CH}_2-\text{R'}\)
4. Apply this to 3-hexyne. Adding hydrogen across the triple bond at carbons 3 and 4 converts it into hexane, a saturated alkane with no double or triple bonds.
5. Name the organic product. The product is hexane, a six-carbon straight-chain alkane, as the triple bond has been fully hydrogenated to a single bond.