Which elimination product is the major product? U r U U a с e Br H₂O Heat HO a НО, b с

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Please answer this question correctly please.

**Question:**

Which elimination product is the major product?

**Reaction:**

The reaction involves the elimination of HBr from the starting compound in the presence of water and heat.

**Structures:**

1. Starting compound: A benzene ring attached to a propyl group with a bromine atom (Br) on the second carbon.

2. Products:
    - **a:** A compound with a benzene ring attached to a propene group via a double bond on the last carbon.
    - **b:** A benzene ring attached to a carbon chain with a double bond between the second and third carbon atoms.
    - **c:** A benzene ring with an isopropyl group having a double bond.
    - **d:** A benzene ring with a hydroxyl group and a hydrocarbon chain.
    - **e:** Similar to **d** but the stereochemistry of the hydroxyl group is different.

**Options:**

- □ b
- □ a
- □ c
- □ d
- □ e

**Explanation:**

The reaction shown involves elimination, likely following Zaitsev's rule, which predicts the formation of the most substituted alkene as the major product. The question requires selecting the most likely major product from the given options.
Transcribed Image Text:**Question:** Which elimination product is the major product? **Reaction:** The reaction involves the elimination of HBr from the starting compound in the presence of water and heat. **Structures:** 1. Starting compound: A benzene ring attached to a propyl group with a bromine atom (Br) on the second carbon. 2. Products: - **a:** A compound with a benzene ring attached to a propene group via a double bond on the last carbon. - **b:** A benzene ring attached to a carbon chain with a double bond between the second and third carbon atoms. - **c:** A benzene ring with an isopropyl group having a double bond. - **d:** A benzene ring with a hydroxyl group and a hydrocarbon chain. - **e:** Similar to **d** but the stereochemistry of the hydroxyl group is different. **Options:** - □ b - □ a - □ c - □ d - □ e **Explanation:** The reaction shown involves elimination, likely following Zaitsev's rule, which predicts the formation of the most substituted alkene as the major product. The question requires selecting the most likely major product from the given options.
Expert Solution
Step 1: Describing Saytzeff's rule

Saytzeff's rule: It predicts the regioselectivity of the alkene formed by the elimination reaction of alkyl halides.. During the elimination reaction, the proton is removed from the carbon atom having lesser number of substituents. The corresponding alkene is known as Saytzeff's product.

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