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August 17, 2024

Organic chemistry

Organic Chemistry II, Summer 2024 07/02/2024 Recitation Worksheet-1 Name- Synthesis of Grignard reagent: Q1. Why should Grignard reagents be prepared under anhydrous (without water) conditions? Answer Q2. Find the appropriate oxirane to get the desired product, also draw the mechanistic cycle. Answer Q3. Write a reaction showing the product formation of 1-phenyl, 3-hexanol using combination of epoxide and Grignard reagent. Answer Q4. Show how to bring about the given conversion using Gilman reagent. a. 1-bromocyclopentane to 1-isopropylcyclopentane. b. Bromobenzene to butylbenzene c. Cyclophexane to isobutylcyclohexane Q5. Which of the following acids will give the fastest reaction? Arrange in ascending (lowest to highest) order. Explain the reason. Answer Q6. How many moles of Grignard reagent are required for conversion of the given substrate? Answer Q7. Formation of carbene Predict the order in the rate of formation of carbene from the given compounds. Is carbene a neutral or charged species? Is carbene an electrophile or nucleophile? a. CHI3 b. CHBr3 c. CHF3 Answer Q8. Arrange the following carbenes in their stability order. Explain the reason. a. CHI3 b. CHBr3 c. CHF3 d. CHCl3 Answer Q9. Predict the product formation in the given reaction. Explain the reason. Q10. Which one of the following products will be formed?

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