Identify the major products in the following reactions ?
`CH_3-CH_2-undersetunderset(" "CH_3)(" "|)oversetoverset(" "CH_3)(" "|)(.^(o+)N)-CH_2-CH_2-CH_3 overset(overset(Theta)(O)H//Delta)to`

Options

A. `CH_3-CH=CH_2`
B. `CH_2=CH_2`
C. `{:(" "CH_(3)),(" |"),(CH_(3)CH_(2)-N-OH),(" "o+"|"),(" "CH_(3)):}`
D. `C_2H_5-OH`

Answer

To identify the major products of the given reaction involving a quaternary ammonium salt, we can follow these steps:

### Step 1: Understand the Reaction Type
The reaction involves a quaternary ammonium salt being treated with a strong base (OH-) and heat. This is indicative of a reaction known as Hofmann elimination.

### Step 2: Identify the Structure of the Quaternary Ammonium Salt
The quaternary ammonium salt is represented as:
```
CH3
|
CH3-CH2-N^+(CH3)2
|
CH2-CH2-CH3
```
In this structure, the nitrogen is bonded to four carbon groups, making it a quaternary ammonium salt.

### Step 3: Apply Hofmann Elimination
In Hofmann elimination, the quaternary ammonium salt decomposes to form an alkene and a tertiary amine (also known as a telseramine). The elimination occurs at the β-hydrogens adjacent to the nitrogen.

### Step 4: Identify β-Hydrogens
In the structure, we can identify the β-hydrogens:
- The β-hydrogens are the hydrogens on the carbon atoms adjacent to the nitrogen.
- There are two β-hydrogens available for elimination.

### Step 5: Determine Possible Alkenes
The elimination can lead to the formation of two possible alkenes:
1. Elimination from the β-hydrogen on the left side (leading to propene).
2. Elimination from the β-hydrogen on the right side (leading to ethylene).

### Step 6: Determine the More Substituted Alkene
According to Zaitsev's rule, the more substituted alkene is favored. In this case:
- The elimination from the β-hydrogen on the left leads to propene (more substituted).
- The elimination from the β-hydrogen on the right leads to ethylene (less substituted).

### Step 7: Write the Major Products
The major products of the reaction will be:
1. **Alkene**: Propene (CH2=CH-CH3)
2. **Telsaramine**: The remaining structure after elimination, which will be:
```
CH3-CH2-N(CH3)2
```

### Final Products
Thus, the major products of the reaction are:
- **Propene (CH2=CH-CH3)**
- **Telsaramine (CH3-CH2-N(CH3)2)**

### Summary of Major Products:
1. Propene (C3H6)
2. Telsaramine (C5H14N)

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