### Exercise 7.8: Determining the Starting Alkene**Problem Statement:**Identify the starting alkene used to synthesize the given product.**Chemical Reaction:**The diagram outlines a chemical reaction where an unidentified alkene undergoes a reaction in the presence of potassium iodide (KI) and phosphoric acid (H₃PO₄) to produce the final product. The structural formula of the product is a cyclohexane ring with an iodine atom and an ethyl group attached to adjacent carbon atoms.**Explanation of the Reaction:**1. **Reagents:** - **KI**: Acts as a source of iodide ions. - **H₃PO₄**: Provides an acidic medium, likely facilitating electrophilic addition.2. **Product Structure:** - The product is a cyclohexane ring (six-carbon ring). - An iodine atom (I) is attached to one of the carbon atoms. - An ethyl group (C₂H₅) is attached to the adjacent carbon atom.**Goal:**The task is to deduce the initial alkene structure, given this iodinated product and the reagents.### Suggested Approach:To solve this problem, consider what alkene, when reacted with iodide in an acidic environment, would lead to the observed substitution pattern on the cyclohexane ring. The process likely involves electrophilic addition where the double bond is replaced by the iodine atom and a new bond forms with the ethyl group.Use this information to propose an appropriate alkene precursor.

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Answered: 7.8 Give the starting alkene used to…

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7.8 Give the starting alkene used to prepare the product. KI H3PO4

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Concept explainers

Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.

Question

### Exercise 7.8: Determining the Starting Alkene

**Problem Statement:**

Identify the starting alkene used to synthesize the given product.

**Chemical Reaction:**

The diagram outlines a chemical reaction where an unidentified alkene undergoes a reaction in the presence of potassium iodide (KI) and phosphoric acid (H₃PO₄) to produce the final product. The structural formula of the product is a cyclohexane ring with an iodine atom and an ethyl group attached to adjacent carbon atoms.

**Explanation of the Reaction:**

1. **Reagents:**
- **KI**: Acts as a source of iodide ions.
- **H₃PO₄**: Provides an acidic medium, likely facilitating electrophilic addition.

2. **Product Structure:**
- The product is a cyclohexane ring (six-carbon ring).
- An iodine atom (I) is attached to one of the carbon atoms.
- An ethyl group (C₂H₅) is attached to the adjacent carbon atom.

**Goal:**
The task is to deduce the initial alkene structure, given this iodinated product and the reagents.

### Suggested Approach:

To solve this problem, consider what alkene, when reacted with iodide in an acidic environment, would lead to the observed substitution pattern on the cyclohexane ring. The process likely involves electrophilic addition where the double bond is replaced by the iodine atom and a new bond forms with the ethyl group.

Use this information to propose an appropriate alkene precursor.

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