The structure of 4-Methylpent-2-en-1-ol is

Options

A. `CH_(3)CH_(2)CH=CHCH_(2)OH`
B. `(CH_(3))_(2)C=CHCH_(2)CH_(2)OH`
C. `(CH_(3))_(2)CHCH=CHCH_(2)OH`
D. `CH_(3)CH(OH)CH-CH=C(CH_(3))_(2)`

Explanation

To determine the structure of 4-Methylpent-2-en-1-ol, we will follow a systematic approach based on the IUPAC nomenclature rules. Here’s a step-by-step solution:

### Step 1: Identify the Parent Chain
The name "pent" indicates that the main carbon chain consists of 5 carbon atoms. We will draw a straight chain of 5 carbon atoms.

**Hint:** The prefix "pent" refers to a five-carbon chain.

### Step 2: Number the Carbon Chain
We need to number the carbon chain. The numbering should start from the end closest to the highest priority functional group, which in this case is the alcohol (-OH) group.

- Numbering from the left:
- C1 - C2 - C3 - C4 - C5

**Hint:** Always number the chain to give the functional groups the lowest possible numbers.

### Step 3: Identify the Substituents
According to the name, we have:
- A methyl group (–CH₃) at the 4th carbon.
- A double bond (alkene) between the 2nd and 3rd carbon.
- An alcohol (–OH) group at the 1st carbon.

**Hint:** The number before the substituent indicates its position on the carbon chain.

### Step 4: Draw the Structure
Now, we can draw the structure based on the information gathered:
1. Start with the 5 carbon chain.
2. Place the methyl group on the 4th carbon.
3. Add the double bond between the 2nd and 3rd carbon.
4. Attach the hydroxyl group (-OH) to the 1st carbon.

The structure can be represented as follows:

```
CH3
|
H2C=C-CH2-CH(CH3)-CH2OH
```

### Step 5: Complete the Valencies
Make sure that all carbon atoms have four bonds. Add hydrogen atoms as necessary to complete the structure.

**Final Structure:**
```
CH3
|
H2C=C-CH2-CH(CH3)-CH2OH
```

### Step 6: Verify the Structure
Check if the structure matches the name:
- 5 carbon atoms (pent).
- Double bond between C2 and C3 (2-en).
- Methyl group on C4 (4-methyl).
- Hydroxyl group on C1 (1-ol).

**Hint:** Cross-check the structure with the IUPAC name to ensure accuracy.

### Conclusion
The structure of 4-Methylpent-2-en-1-ol has been successfully drawn and verified.