Which of the following having delocalised electron

Options

A. Benzene
B. Cyclohexane
C. `CH_4`
D. `C_2H_6`

Answer

To determine which of the following compounds has delocalized electrons, we need to analyze the structure of each compound. Delocalized electrons are electrons that are not associated with a single atom or a single covalent bond but are spread over several atoms, typically seen in conjugated systems or aromatic compounds.

### Step-by-Step Solution:

1. **Identify the Compounds**: First, we need to identify the compounds in question. Since the question does not specify them, we will assume common examples such as benzene, toluene, ethylene, and cyclohexane.

2. **Analyze the Structure**:
- **Benzene (C6H6)**: Benzene has a planar ring structure with alternating double bonds, which allows for the delocalization of π electrons across the entire ring. Thus, benzene has delocalized electrons.
- **Toluene (C7H8)**: Toluene is similar to benzene but has a methyl group attached. The delocalization of electrons occurs in the benzene ring, so toluene also has delocalized electrons.
- **Ethylene (C2H4)**: Ethylene has a double bond between two carbon atoms, but the electrons are localized between those two carbons. Therefore, ethylene does not have delocalized electrons.
- **Cyclohexane (C6H12)**: Cyclohexane is a saturated hydrocarbon with single bonds only. There are no π bonds or delocalized electrons in cyclohexane.

3. **Conclusion**: From the analysis:
- Benzene and Toluene have delocalized electrons.
- Ethylene and Cyclohexane do not have delocalized electrons.

### Final Answer:
The compounds with delocalized electrons are **Benzene and Toluene**.