Which of the following is not one of the products formed in the reaction? `2CH_3 - CH_2 -- CI+ 2Na -rarr^(dry ethanol)`

Options

A. `CH_3- CH_3`
B. `CH_2=CH_2`
C. `CH_3 -CH_2 - CH_2 - CH_3`
D. `CH_3 -CH_2 - CH_3`

Answer

To determine which of the following is not one of the products formed in the reaction of `2CH_3 - CH_2 - Cl + 2Na -> (dry ethanol)`, we need to analyze the reaction step by step.

### Step 1: Understand the Reactants
The reactants are `2CH_3 - CH_2 - Cl` (ethyl chloride) and `2Na`. Ethyl chloride is an alkyl halide, and sodium is a metal that can participate in reactions with halides.

### Step 2: Identify the Reaction Type
This reaction is a Wurtz reaction, which typically involves the coupling of alkyl halides in the presence of sodium metal to form higher alkanes. In this case, we have two moles of ethyl chloride.

### Step 3: Determine Possible Products
When ethyl chloride reacts with sodium, the following products can be formed:
1. **Dimerization**: The two ethyl groups can couple to form butane (`CH3-CH2-CH2-CH3`).
2. **Disproportionation**: This can lead to the formation of ethane (`CH3-CH3`) and possibly other products.

### Step 4: List the Possible Products
From the Wurtz reaction of ethyl chloride, the possible products include:
- Butane (C4H10)
- Ethane (C2H6)

### Step 5: Identify the Incorrect Product
The question asks which of the following is not one of the products formed in the reaction. The options provided likely include:
1. Butane
2. Ethane
3. Propane
4. Other products

Since we established that butane and ethane are indeed products of the reaction, we need to identify which of the options is not a product. Propane (C3H8) is not formed from the dimerization or disproportionation of ethyl chloride.

### Conclusion
The product that is not formed in the reaction is **propane**.