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Cyclohexene on ozonolysis followed by re...

Cyclohexene on ozonolysis followed by reaction with zinc dust and water gives compound E. Compound E on furhter treatment with aqueous KOH yields compound F. Compound F is

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To solve the problem step by step, we will analyze the reactions involving cyclohexene, ozonolysis, and subsequent reactions with zinc dust, water, and aqueous KOH. ### Step 1: Ozonolysis of Cyclohexene Cyclohexene (C6H10) undergoes ozonolysis, which involves the cleavage of the double bond (C=C) and the formation of carbonyl groups (C=O). **Reaction:** - The double bond in cyclohexene breaks, and two carbonyl groups are formed. - The structure of cyclohexene is as follows: ``` H H \ / C / \ C C / \ H H ``` - After ozonolysis, we get two carbonyl groups at the ends of the molecule, leading to the formation of a diketone. **Product E:** The product E is 2,3-hexanedione (C6H10O2). ### Step 2: Reaction of Compound E with Zinc Dust and Water The next step involves treating the diketone (compound E) with zinc dust and water. This reaction is a reductive workup that converts the diketone into an alcohol. **Reaction:** - The diketone is reduced to a diol (specifically a 1,2-diol). - The structure of compound E (2,3-hexanedione) after reduction becomes: ``` OH OH \ / C-C / \ C C / \ H H ``` **Product E:** The product E is 2,3-hexanediol (C6H12O2). ### Step 3: Treatment of Compound E with Aqueous KOH Now, we treat the diol (compound E) with aqueous KOH. This leads to an intramolecular aldol condensation because the molecule contains two carbonyl groups. **Reaction:** - The hydroxide ion (OH-) abstracts an alpha hydrogen from one of the hydroxyl groups, forming an enolate ion. - This enolate ion then attacks the carbonyl carbon of the other carbonyl group, forming a cyclic intermediate. - After dehydration (loss of water), we obtain a conjugated system. **Final Product F:** The final product F is 2-hexenal (C6H10O), which is an α,β-unsaturated aldehyde. ### Summary of Products: - Compound E: 2,3-hexanediol (C6H12O2) - Compound F: 2-hexenal (C6H10O) ### Final Answer: Compound F is 2-hexenal. ---
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