Which of the following is an example of vic-dihalide?

Options

A. Dichloromethane
B. 1, 2-dichloromethane
C. Ethylidene chloride
D. Allyl chloride

Explanation

To determine which of the given compounds is an example of a vicinal dihalide, we need to understand the definition of vicinal dihalides and analyze the provided options.

### Step-by-Step Solution:

1. **Understanding Vicinal Dihalides**:
- Vicinal dihalides are compounds where two halogen atoms are attached to adjacent carbon atoms in a carbon chain. For example, in a 1,2-dihalide, the halogens are on the first and second carbon atoms.

2. **Analyzing the Options**:
- **Dichloromethane (CH2Cl2)**: This compound has both chlorine atoms attached to the same carbon atom (the carbon in the middle), making it a geminal dihalide, not a vicinal dihalide.
- **1,2-Dichloromethane (CH2Cl-CHCl)**: In this compound, the two chlorine atoms are attached to adjacent carbon atoms (the first and second carbon), which fits the definition of a vicinal dihalide.
- **Ethylidene Chloride (CH2=CCl2)**: This compound has one chlorine atom on a carbon that is part of a double bond and another chlorine on the adjacent carbon. However, it is not a vicinal dihalide since one of the halogens is attached to a carbon involved in a double bond.
- **Allyl Chloride (CH2=CH-CH2Cl)**: In this compound, the chlorine is attached to a carbon that is part of a double bond (sp2 hybridized), which does not meet the criteria for vicinal dihalides.

3. **Conclusion**:
- The only compound from the options that qualifies as a vicinal dihalide is **1,2-Dichloromethane**.

### Final Answer:
1,2-Dichloromethane is an example of a vicinal dihalide.

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