Which of the following is a tertiary alcohol

Options

A. `(CH_(3))_(2) CHCH_(2)OH`
B. `CH_(3)CH_(2)CH_(2)CH_(2)OH`
C. `CH_(3)CH_(2)CH_(2)OH`
D. `(CH_(3))_(3)COH`

Answer

To determine which of the given compounds is a tertiary alcohol, we need to understand the definition of tertiary alcohols and analyze each option accordingly.

### Step-by-Step Solution:

1. **Understand the Definition of Tertiary Alcohol:**
A tertiary alcohol is one in which the hydroxyl (–OH) group is attached to a carbon atom that is connected to three other carbon atoms (alkyl groups). This means that the carbon atom with the –OH group has no hydrogen atoms attached to it.

2. **Analyze Each Compound:**
We will look at each compound provided in the options and determine the structure to see if it fits the definition of a tertiary alcohol.

- **Option 1:** CH3-CH3-CH(OH)-CH2
- The carbon with the –OH group (C) is connected to only one alkyl chain (CH2) and has two hydrogen atoms attached. This means it is a primary alcohol, not tertiary.

- **Option 2:** CH3-CH2-CH2-CH2(OH)
- The carbon with the –OH group is connected to only one alkyl chain (the longest chain), and it has two hydrogen atoms attached. This is also a primary alcohol.

- **Option 3:** CH3-CH2-CH(OH)-CH2
- The carbon with the –OH group is connected to only one alkyl chain and has two hydrogen atoms attached. This is again a primary alcohol.

- **Option 4:** CH3-CH3-CH3(OH)
- The carbon with the –OH group is connected to three alkyl chains (all CH3 groups) and has no hydrogen atoms attached. This fits the definition of a tertiary alcohol.

3. **Conclusion:**
Based on the analysis, the only compound that qualifies as a tertiary alcohol is **Option 4**.

### Final Answer:
The tertiary alcohol among the given options is **Option 4** (CH3-CH3-CH3(OH)).