The `IUPAC` name of `CH_(3)COCH(CH_(3))_(2)` is

Options

A. 4-Methyl isopropyl ketone
B. 3-Methybutan-2-one
C. Isopropylmethyl ketone
D. 2-Methylbutan-3-one

Explanation

To find the IUPAC name of the compound `CH₃COCH(CH₃)₂`, we will follow these steps:

### Step 1: Draw the Structure
The given compound can be represented as follows:

```
CH₃
|
CH₃ - C - CO - CH₃
|
CH₃
```

### Step 2: Identify the Longest Carbon Chain
In this structure, we need to identify the longest continuous carbon chain. The longest chain contains 4 carbon atoms, which can be represented as:

```
CH₃ - C - C - CH₃
```

### Step 3: Number the Carbon Chain
Number the carbon chain starting from the end closest to the substituent. In this case, we can number the carbons as follows:

```
1 2 3 4
CH₃ - C - CO - CH₃
|
CH₃
```

### Step 4: Identify Substituents
From the numbering, we can see that there is a methyl (−CH₃) group attached to carbon 3.

### Step 5: Identify the Functional Group
The compound has a ketone functional group (C=O) located on carbon 2. The suffix for a ketone is "one".

### Step 6: Combine the Information
Now we can combine all the information:
- The longest carbon chain is 4 carbons, which is "butane".
- The ketone group is on carbon 2, so we use "butan-2-one".
- There is a methyl group on carbon 3, which we denote as "3-methyl".

### Step 7: Write the Final IUPAC Name
Putting it all together, the IUPAC name of the compound is **3-methylbutan-2-one**.

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