The number of tetirary carbon atoms in the compound `(CH_(3))_(2)CHCH_(2)C(CH_(3))_(3)` is

Options

A. 2
B. 3
C. 1
D. 4

Answer

To determine the number of tertiary carbon atoms in the compound `(CH₃)₂CHCH₂C(CH₃)₃`, we need to analyze the structure of the compound and identify the carbon atoms that are bonded to three other carbon atoms.

### Step-by-Step Solution:

1. **Identify the Structure**:
The compound can be expanded to show its structure:
- `(CH₃)₂CH` indicates a carbon atom (C1) bonded to two methyl groups (CH₃) and one other carbon atom (C2).
- `CH₂` indicates another carbon atom (C2) bonded to C1 and C3.
- `C(CH₃)₃` indicates a carbon atom (C3) bonded to three methyl groups (CH₃) and one other carbon atom (C2).

2. **Label the Carbon Atoms**:
Let's label the carbon atoms in the compound:
- C1: `(CH₃)₂C` (the carbon connected to two CH₃ groups)
- C2: `CH` (the carbon connected to C1 and C3)
- C3: `CH₂` (the carbon connected to C2 and C4)
- C4: `C(CH₃)₃` (the carbon connected to three CH₃ groups)

3. **Determine the Type of Each Carbon**:
- **C1**: This carbon is connected to two CH₃ groups and one other carbon (C2). It is a secondary carbon.
- **C2**: This carbon is connected to C1 and C3. It is a primary carbon.
- **C3**: This carbon is connected to C2 and C4. It is a secondary carbon.
- **C4**: This carbon is connected to three CH₃ groups. It is a tertiary carbon.

4. **Count the Tertiary Carbon Atoms**:
From the analysis, we find that there is **one tertiary carbon atom** in the compound, which is C4.

### Final Answer:
The number of tertiary carbon atoms in the compound `(CH₃)₂CHCH₂C(CH₃)₃` is **1**.