IUPAC name of ` CH_(3)-underset((CH_(2)CH_(3)))underset(|)CH-CH_(2)-underset(CN)underset(|)CH-CH_(3)` is

Options

A. 2-cyano, 3-methylhexane
B. 2-dimethyl, 4-cyanopentane
C. 3-methyl, 5-cyanohexane .
D. 2-cyano, 4-methylhexane .

Explanation

To find the IUPAC name of the compound `CH3-CH(CH2CH3)-CH(CH2)-CH(CN)-CH(CH3)`, we will follow the steps outlined below:

### Step-by-Step Solution:

1. **Identify the Longest Carbon Chain**:
- The first step is to identify the longest continuous carbon chain in the structure. In this case, the longest chain consists of 6 carbon atoms.

2. **Number the Carbon Chain**:
- Number the carbon chain from one end to the other. We can start numbering from either end, but we will choose the end that gives the substituents the lowest possible numbers.
- If we number from the left, we get:
- C1: CH3
- C2: CH
- C3: CH2
- C4: CH(CN)
- C5: CH
- C6: CH2CH3
- This gives us the positions of the substituents.

3. **Identify and Name the Substituents**:
- From our numbering:
- At C2, we have a cyanide group (CN).
- At C4, we have a methyl group (CH3).
- The substituents are:
- 2-cyano
- 4-methyl

4. **Combine the Names**:
- According to IUPAC naming conventions, we list the substituents in alphabetical order, regardless of their position numbers.
- Therefore, we write "2-cyano" before "4-methyl".

5. **Determine the Base Name**:
- Since the longest carbon chain has 6 carbons, the base name will be "hexane".

6. **Final IUPAC Name**:
- Combining everything, the IUPAC name of the compound is **2-cyano-4-methylhexane**.

### Summary:
The IUPAC name of the compound is **2-cyano-4-methylhexane**.