The IUPAC name of `CH_3-O-CH_2CH_2CH_3` is

Options

A. propoxy methane
B. methoxy propane
C. methyl propyl ether
D. propyl methyl ether.

Explanation

To determine the IUPAC name of the compound `CH3-O-CH2CH2CH3`, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**:
The given structure is `CH3-O-CH2CH2CH3`. This indicates that there is an ether functional group (R-O-R') where R is a methyl group (CH3) and R' is a propyl group (CH2CH2CH3).

2. **Determine the Longest Carbon Chain**:
In this structure, the longest carbon chain is the propyl group, which consists of three carbon atoms (CH2CH2CH3).

3. **Identify the Alkoxy Group**:
The smaller group attached to the oxygen is the methyl group (CH3). In ether nomenclature, this group is referred to as the "alkoxy" group.

4. **Name the Alkoxy Group**:
The alkoxy group here is derived from the methyl group, which is named "methoxy".

5. **Name the Longest Carbon Chain**:
The longest carbon chain is a propyl group, which is named "propane".

6. **Combine the Names**:
In ether nomenclature, we combine the names of the alkoxy group and the longest carbon chain. The alkoxy group (methoxy) is placed first, followed by the name of the longest chain (propane).

7. **Final IUPAC Name**:
Therefore, the IUPAC name of the compound `CH3-O-CH2CH2CH3` is **methoxypropane**.

### Final Answer:
The IUPAC name of `CH3-O-CH2CH2CH3` is **methoxypropane**.

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