Ease of ionization to produce carbocation and bromide ion under the treatment of `Ag^(o+)` will be maximum in ?

Options

A.
B.
C.
D.

Answer

To determine which compound has the maximum ease of ionization to produce a carbocation and bromide ion under the treatment of `Ag^(o+)`, we need to analyze the stability of the carbocations formed from the given compounds. The more stable the carbocation, the easier the ionization will be.

### Step-by-Step Solution:

1. **Identify the Compounds**: We need to analyze the stability of carbocations formed from the given options. The question implies that we have several aromatic compounds with bromine substituents.

2. **Understanding Carbocation Stability**: Carbocations are stabilized by resonance and the presence of electron-donating groups. Aromatic compounds tend to stabilize carbocations due to their resonance structures.

3. **Analyze Each Option**:
- **Option 1**: A 5-membered ring with bromine.
- After ionization, a positive charge is formed on a carbon in the ring. This structure is anti-aromatic (4 π electrons), making it unstable. Therefore, ionization is not easy.

- **Option 2**: A 6-membered ring with an oxygen heteroatom and bromine.
- Upon ionization, a positive charge is formed. The structure can be stabilized by resonance involving the oxygen atom. This compound has 6 π electrons (aromatic), making it stable. Thus, ionization is easier.

- **Option 3**: Bromobenzene.
- When treated with `Ag^(o+)`, the positive charge on the benzene ring makes it unstable. The instability of the carbocation means that ionization is not easy.

- **Option 4**: A 6-membered ring with a double bond and bromine.
- Similar to option 2, this compound can stabilize the carbocation through resonance. However, the presence of a double bond may affect the stability compared to option 2.

4. **Conclusion**: Among the options analyzed, **Option 2** is the most stable due to its aromatic nature and the ability of the oxygen to stabilize the positive charge through resonance. Therefore, the ease of ionization to produce a carbocation and bromide ion under the treatment of `Ag^(o+)` will be maximum in **Option 2**.

### Final Answer:
The ease of ionization to produce carbocation and bromide ion under the treatment of `Ag^(o+)` will be maximum in **Option 2**.