Which of the following has the lowest potential energy (all are forms of 1- isopropyl-3-methylcyclohexane)? | ||| (CH3)2CH 47 "H CH3 Select one: O A. III OB. I O C. II O D. IV (CH3)2CH H -CH(CH3)2 -CH3 IV (CH3)2CH H H -CH3 CH3 H

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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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**Question:**

Which of the following has the lowest potential energy (all are forms of 1-isopropyl-3-methylcyclohexane)?

**Structures:**

- **I:** A cyclohexane chair conformation with an isopropyl group (CH(CH₃)₂) and a methyl group (CH₃) both in axial positions relative to the cyclohexane ring.

- **II:** A cyclohexane chair conformation with an isopropyl group (CH(CH₃)₂) in axial and a methyl group (CH₃) in equatorial position.

- **III:** A cyclohexane chair conformation with a methyl group (CH₃) in axial and an isopropyl group (CH(CH₃)₂) in equatorial position.

- **IV:** A cyclohexane chair conformation with both the isopropyl group (CH(CH₃)₂) and the methyl group (CH₃) in equatorial positions.

**Selection Options:**

- A. III
- B. I
- C. II
- D. IV

**Explanation of Structures:**

In cyclohexane chair conformations, substituents in equatorial positions generally lead to lower potential energy due to reduced steric hindrance compared to axial positions. Thus, structure IV is expected to have the lowest potential energy because both substituents are in equatorial positions.
Transcribed Image Text:**Question:** Which of the following has the lowest potential energy (all are forms of 1-isopropyl-3-methylcyclohexane)? **Structures:** - **I:** A cyclohexane chair conformation with an isopropyl group (CH(CH₃)₂) and a methyl group (CH₃) both in axial positions relative to the cyclohexane ring. - **II:** A cyclohexane chair conformation with an isopropyl group (CH(CH₃)₂) in axial and a methyl group (CH₃) in equatorial position. - **III:** A cyclohexane chair conformation with a methyl group (CH₃) in axial and an isopropyl group (CH(CH₃)₂) in equatorial position. - **IV:** A cyclohexane chair conformation with both the isopropyl group (CH(CH₃)₂) and the methyl group (CH₃) in equatorial positions. **Selection Options:** - A. III - B. I - C. II - D. IV **Explanation of Structures:** In cyclohexane chair conformations, substituents in equatorial positions generally lead to lower potential energy due to reduced steric hindrance compared to axial positions. Thus, structure IV is expected to have the lowest potential energy because both substituents are in equatorial positions.
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