How many structural isomers are possible for `C_(4) H_(10) O`

Options

A. 3
B. 4
C. 5
D. 7

Explanation

To determine the number of structural isomers for the molecular formula \( C_4H_{10}O \), we will follow these steps:

### Step 1: Identify the possible functional groups
The molecular formula \( C_4H_{10}O \) can represent different types of compounds, primarily alcohols, ethers, and possibly aldehydes or ketones. However, given the number of carbons and hydrogens, we will focus on alcohols and ethers.

### Step 2: Count the structural isomers for alcohols
1. **Butan-1-ol**: \( CH_3(CH_2)_3OH \) (straight-chain alcohol)
2. **Butan-2-ol**: \( CH_3CH(OH)CH_2CH_3 \) (secondary alcohol)
3. **2-Methylpropan-1-ol**: \( (CH_3)_2CHCH_2OH \) (branched alcohol)
4. **2-Methylpropan-2-ol**: \( (CH_3)_2C(OH)(CH_3) \) (tertiary alcohol)

### Step 3: Count the structural isomers for ethers
1. **Methyl isopropyl ether**: \( CH_3OCH(CH_3)_2 \) (ether with a branched structure)
2. **Diethyl ether**: \( CH_3CH_2OCH_2CH_3 \) (ether with straight-chain structure)

### Step 4: Total the isomers
From our analysis, we have:
- 4 structural isomers from alcohols
- 2 structural isomers from ethers

Adding these together gives us a total of 6 structural isomers.

### Final Answer
The total number of structural isomers for \( C_4H_{10}O \) is **6**.

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