The correct IUPAC name of
`CH_(3)-CH_(2)-C-=C-C-=CH`

Options

A. 3-hexyn-5-ene
B. 5-hexen-3-yne
C. 3-hexyn-1-ene
D. hex-1,3-diyne

Answer

To determine the correct IUPAC name for the compound `CH₃-CH₂-C≡C-C≡CH`, we will follow these steps:

### Step 1: Identify the Parent Chain
1. Count the number of carbon atoms in the longest continuous chain. In this case, there are 6 carbon atoms.
- **Hint**: Look for the longest continuous chain of carbon atoms.

### Step 2: Determine the Base Name
2. Since there are 6 carbon atoms, the base name will be derived from "hexane".
- **Hint**: The base name is determined by the number of carbon atoms in the longest chain.

### Step 3: Identify the Functional Groups
3. Identify the types and positions of the functional groups. In this case, there are two triple bonds (alkynes) present in the chain.
- **Hint**: Triple bonds are characteristic of alkynes.

### Step 4: Number the Carbon Chain
4. Number the carbon chain to give the lowest possible numbers to the triple bonds. Start numbering from the end of the chain closest to the first triple bond:
- The numbering from left to right gives the first triple bond at position 1 and the second at position 3.
- **Hint**: Always number the chain to minimize the locants of the functional groups.

### Step 5: Write the IUPAC Name
5. Combine the base name with the locants of the triple bonds. The correct IUPAC name will be:
- Hex-1,3-diyne
- **Hint**: Use "diyne" to indicate that there are two triple bonds in the compound.

### Final Answer
The correct IUPAC name for the compound `CH₃-CH₂-C≡C-C≡CH` is **Hex-1,3-diyne**.