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In Dow's process haloarene is converted ...

In Dow's process haloarene is converted to phenol with fused NAOH . The most reactive compound is

A

B

C

D

All are equally reactive

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To solve the question regarding the most reactive compound in Dow's process where haloarene is converted to phenol using fused NaOH, we can follow these steps: ### Step-by-Step Solution: 1. **Understand Dow's Process**: - Dow's process involves the conversion of haloarenes (aromatic compounds with halogen substituents) to phenols using molten sodium hydroxide (NaOH) at high temperatures (around 370°C). - The reaction mechanism involves the formation of a benzyne intermediate. 2. **Identify the Reaction Mechanism**: - In the presence of NaOH, the hydroxide ion (OH-) abstracts a hydrogen atom from the haloarene, resulting in the formation of a negatively charged intermediate. - The halogen (e.g., Cl) is then eliminated, leading to the formation of the benzyne intermediate, which is highly reactive. 3. **Consider the Types of Bonds**: - The reactivity of haloarenes in this process depends on the strength of the carbon-halogen bond (C-X bond) that needs to break. - The types of bonds that can be present in the haloarene are C-H, C-D (deuterium), and C-T (tritium). 4. **Compare Bond Strengths**: - The bond strengths are as follows: - C-H bond (weakest) - C-D bond (stronger than C-H) - C-T bond (strongest) - Since the C-H bond is the weakest, it will break more easily compared to C-D and C-T bonds. 5. **Determine the Most Reactive Compound**: - The compound with the C-H bond will be the most reactive in the Dow's process because it will cleave faster, leading to the formation of the benzyne intermediate more readily. - Therefore, the haloarene containing the C-H bond will react the quickest and thus be the most reactive. 6. **Conclusion**: - Based on the analysis, the correct answer is the compound that contains the C-H bond, as it will undergo the reaction more rapidly than those containing C-D or C-T bonds. ### Final Answer: The most reactive compound in Dow's process is the one that contains the C-H bond. ---
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