Dehalogenation of Vicinal Dihalides

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$$\text{R--CHX--CH}_2\text{X} + \text{Zn} \xrightarrow{\Delta} \text{R--CH=CH}_2 + \text{ZnX}_2$$

Concept: Vicinal dihalides (compounds containing two halogen atoms attached to adjacent carbon atoms) undergo dehalogenation when treated with metallic zinc upon heating, yielding an alkene.

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