The IUPAC name of `C_(2)H_(5)-O-CH(CH_(3))_(2)`

Options

A. Ethoxy propane
B. 1,1-dimenthyl ether
C. 2- Ethoxy isopropane
D. 2-Ethoxy propane

Answer

To determine the IUPAC name of the compound `C2H5-O-CH(CH3)2`, we can follow these steps:

### Step 1: Identify the Structure
The molecular formula `C2H5-O-CH(CH3)2` indicates that we have an ether. We can break it down as follows:
- `C2H5` corresponds to an ethyl group (CH3-CH2-).
- `O` is the oxygen atom connecting the two parts of the ether.
- `CH(CH3)2` indicates a carbon atom bonded to two methyl groups (CH3) and one hydrogen atom, which is a part of an isopropyl group.

### Step 2: Draw the Structure
From the breakdown:
- The ethyl group (C2H5) is on one side of the oxygen.
- The isopropyl group (CH(CH3)2) is on the other side.

The structure can be represented as:
```
CH3
|
CH3-CH-O-CH2-CH3
```

### Step 3: Number the Carbon Chain
When naming ethers, we need to identify the longest carbon chain and number it. In this case, the longest carbon chain is the isopropyl group:
- Start numbering from the end closest to the oxygen.
- The ethyl group is on the second carbon.

### Step 4: Name the Groups
- The ethyl group (C2H5) connected to the oxygen is termed as "ethoxy."
- The isopropyl group (C3H7) is termed as "propane."

### Step 5: Combine the Names
Since the ethoxy group is on the second carbon of the propane chain, we combine the names:
- The IUPAC name is "2-ethoxypropane."

### Final Answer
The IUPAC name of the compound `C2H5-O-CH(CH3)2` is **2-ethoxypropane**.

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