Pinocolone is

Options

A. 2,3-dimethyl-2,3-butanone
B. 3,3-dimethyl-2-butanone
C. 1-phenyl-2-propanone
D. 1,1-diphenyl-2-ethanediol

Explanation

To derive the structure of pinacolone and explain its components, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Compound**: Pinacolone is a ketone derived from pinacol. It is important to recognize that it contains a carbonyl group (C=O) which is characteristic of ketones.

2. **Drawing the Structure**:
- Start with the carbon skeleton. Pinacolone has a four-carbon chain.
- The carbonyl group (C=O) is located on the second carbon of the chain.
- The structure can be represented as follows:
```
CH3
|
CH3-C-CO-CH2-CH3
|
CH3
```
- This structure can be simplified to show the carbonyl group more clearly:
```
CH3
|
CH3-C(=O)-CH2-CH3
```

3. **Naming the Compound**:
- According to IUPAC nomenclature, we identify the longest carbon chain that includes the carbonyl group.
- The ketone functional group takes precedence in naming. The longest chain has four carbons, so the base name is "butane".
- The carbonyl group is on the second carbon, so we use "2-" to indicate its position.
- The presence of two methyl groups on the third carbon gives us "3,3-dimethyl".
- Therefore, the full IUPAC name is **3,3-dimethyl-2-butanone**.

4. **Properties of Pinacolone**:
- Pinacolone is a colorless liquid.
- It has a camphor-like odor.

5. **Final Summary**:
- The structure of pinacolone is characterized by a ketonic group and two methyl groups, making it a 3,3-dimethyl-2-butanone. It is a colorless liquid with a distinct odor reminiscent of camphor.