IUPAC name of the compound `CH_(3)-underset(CH_(3))underset(|)(CH)-OCH_(2)CH_(3)` is............ .

Options

A. 1-Ethoxy-1-methylethane
B. 2-Ethoxy-2-methylethane
C. 2-Ethoxypropane
D. Isopropylethyl ether.

Explanation

To determine the IUPAC name of the compound \( CH_3-CH(CH_3)-O-CH_2CH_3 \), we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**:
The compound can be represented as:
\[ CH_3-CH(CH_3)-O-CH_2CH_3 \]
This shows that there is a central carbon atom connected to two methyl groups (CH3) and an ether functional group (-O-) connecting to an ethyl group (CH2CH3).

2. **Determine the Longest Carbon Chain**:
We need to identify the longest continuous carbon chain that includes the ether oxygen. In this case, the longest chain consists of three carbon atoms (the central carbon and the two carbons from the ethyl group).

3. **Number the Carbon Chain**:
We will number the carbon chain starting from the end closest to the ether functional group.
- The numbering will be:
- 1: CH2 (from ethyl)
- 2: CH (central carbon)
- 3: CH3 (methyl group)

4. **Identify Substituents**:
The substituents on the carbon chain are:
- At position 2, there is an ethoxy group (O-CH2CH3).
- At position 2, there is also a methyl group (CH3).

5. **Assign the IUPAC Name**:
Since we have a three-carbon chain (propane) and the substituent is an ethoxy group at position 2, the IUPAC name will be:
\[ 2-\text{ethoxy}-\text{propane} \]

### Final Answer:
The IUPAC name of the compound \( CH_3-CH(CH_3)-O-CH_2CH_3 \) is **2-ethoxypropane**.

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