TOPIC: 6

TOPIC: 6. Alkenes

SUBTOPIC: 62. Dehydrohalogenation

1. Draw all the products formed in the following reaction.

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2. Which bromide which will give the best yield of elimination product(s) with KOCH₂CH₃ in ethanol?

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3. What is the major product of the following reaction?

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4. Write the E2 transition state for the following reaction. Show the proper conformation of the six-membered ring in a chair form and be sure to show dotted lines for all bonds that are forming and breaking as well as partial charges. Does the reaction proceed from the most stable conformation? Explain.

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5. Which isomer will undergo E2 elimination with KOH faster? Use chair conformation drawings to explain your answer.

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6. Draw two products formed in each of the following reactions. Label the major product.

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7. Which halide gives the highest ratio of elimination to substitution when treated with KOCH₂CH₃ in CH₃CH₂OH?

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8. Write the reagents over the arrow. Number them if they cannot be mixed.

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