Benzene and other aromatic hydrocarbons, though contain `pi`-bonds, yet they behave as saturated hydrocarbons. They are stable because of delocalisation of cloud. These undergo electrophilic substitution reactions as :
`C_(6)H_(5)-H + YZ to C_(6)H_(5)Y +HZ`
The reactivity of aromatic hydrocarbons towards electrophilic substitution depends upon the electron density in the benzene ring
Which of the following is not compatible with arenes?

Options

A. Greater stability
B. Delocalisation of `pi`-electrons
C. Electrophilic addition
D. Resonance

Answer

To solve the question regarding the compatibility of certain reactions with arenes (aromatic hydrocarbons), we need to understand the nature of aromatic compounds and their reactions, particularly electrophilic substitution reactions.

### Step-by-Step Solution:

1. **Understanding Aromatic Hydrocarbons**:
- Aromatic hydrocarbons, such as benzene, are characterized by their cyclic structure and the presence of delocalized π-electrons.
- They follow Huckel's rule, which states that a planar cyclic molecule must have (4n + 2) π-electrons (where n is a non-negative integer) to be considered aromatic. For benzene, n = 1, giving it 6 π-electrons.

2. **Stability of Aromatic Compounds**:
- The stability of aromatic compounds arises from the delocalization of π-electrons across the ring structure. This delocalization leads to a lower energy state and greater stability compared to non-aromatic compounds.

3. **Electrophilic Substitution Reactions**:
- Aromatic compounds typically undergo electrophilic substitution rather than electrophilic addition. This is because electrophilic addition would disrupt the aromaticity of the ring.
- In an electrophilic substitution reaction, an electrophile replaces a hydrogen atom on the benzene ring, maintaining the aromatic character of the compound.

4. **Identifying Non-Compatible Reactions**:
- The question asks which reaction is not compatible with arenes. Electrophilic addition reactions (like those seen in alkenes) are not compatible with aromatic compounds because they would convert the aromatic ring into a non-aromatic structure, thus losing stability.
- Therefore, any reaction that involves the addition of electrophiles to the benzene ring, rather than substitution, would not be compatible.

5. **Conclusion**:
- Based on the above understanding, the answer to the question is that electrophilic addition reactions are not compatible with arenes.

### Final Answer:
Electrophilic addition reactions are not compatible with arenes.

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