Heating of ` [CH_3 CH_2 CH_2CH(CH_3 )N^(+)(CH_3)_3 OH ^-` gives the major product :

Options

A. `CH_2 = CH_2 `
B. `CH_(3) CH_(2) CH_(2) CH = CH _2 `
C. `CH_(3) CH_(2) CH=CH CH_(3)`
D. `CH_(2) = CHCH_(2) CH =CH_(2)`

Answer

To solve the problem of determining the major product formed by heating the compound \( [CH_3 CH_2 CH_2 CH(CH_3) N^+(CH_3)_3 OH^-] \), we can follow these steps:

### Step 1: Identify the Compound
The given compound is a quaternary ammonium hydroxide. It has the structure:
\[ CH_3 CH_2 CH_2 CH(CH_3) N^+(CH_3)_3 OH^- \]

### Step 2: Understand the Reaction
When quaternary ammonium hydroxides are heated, they undergo a reaction known as the **Hofmann elimination**. This reaction typically results in the formation of an alkene.

### Step 3: Analyze the Structure
In the compound, the nitrogen atom is positively charged and is bonded to four alkyl groups. The alpha carbon is the one directly attached to the nitrogen, and the beta carbons are those adjacent to the alpha carbon.

### Step 4: Identify Beta Hydrogens
From the structure, we can identify the beta hydrogens:
- The alpha carbon (attached to nitrogen) has two beta carbons, each with one hydrogen atom that can be eliminated.

### Step 5: Apply Hofmann's Rule
According to Hofmann's rule, the less substituted alkene will be the major product. In this case, the elimination can occur from either of the beta positions:
1. Removing a hydrogen from the first beta carbon (leading to a less substituted alkene).
2. Removing a hydrogen from the second beta carbon (leading to a more substituted alkene).

### Step 6: Determine the Major Product
The less substituted alkene will be formed by removing a hydrogen from the first beta carbon. The structure of the resulting alkene will be:
\[ CH_3 CH_2 CH_2 CH=CH_2 \]
This is the major product of the reaction.

### Step 7: Conclusion
The major product formed upon heating the given quaternary ammonium hydroxide is:
\[ CH_3 CH_2 CH_2 CH=CH_2 \]

### Final Answer
The correct option corresponding to the major product is option number two.

---