H3C)2HC "CH2CH

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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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In the lowest energy conformation of the compound below, how many alkyl substituents are equatorial?

The image shows the structural formula of a substituted cyclohexane molecule. The cyclohexane ring, a hexagon, is at the center of the structure.

- The upper right carbon atom in the cyclohexane ring is bonded to a methyl group (CH₃), represented with a wedge to indicate it is positioned above the plane of the cyclohexane ring.
- The lower right carbon atom is bonded to an ethyl group (CH₂CH₃), shown with a dashed wedge indicating it is positioned below the plane of the ring.
- The lower left carbon atom is bonded to an isopropyl group ((CH₃)₂HC), also represented with a dashed wedge indicating it is positioned below the plane of the ring.

This diagram illustrates the stereochemistry of three substituents on the cyclohexane ring, using wedges and dashed wedges to indicate the orientation of the groups relative to the plane of the ring.
Transcribed Image Text:The image shows the structural formula of a substituted cyclohexane molecule. The cyclohexane ring, a hexagon, is at the center of the structure. - The upper right carbon atom in the cyclohexane ring is bonded to a methyl group (CH₃), represented with a wedge to indicate it is positioned above the plane of the cyclohexane ring. - The lower right carbon atom is bonded to an ethyl group (CH₂CH₃), shown with a dashed wedge indicating it is positioned below the plane of the ring. - The lower left carbon atom is bonded to an isopropyl group ((CH₃)₂HC), also represented with a dashed wedge indicating it is positioned below the plane of the ring. This diagram illustrates the stereochemistry of three substituents on the cyclohexane ring, using wedges and dashed wedges to indicate the orientation of the groups relative to the plane of the ring.
**Question 37:**

In the lowest energy conformation of the compound below, how many alkyl substituents are axial?

[Diagram of a cyclohexane ring with three substituents]:
- One methyl group (CH₃) attached with a wedge.
- One ethyl group (CH₂CH₃) attached with a dash.
- Another ethyl group ((H₃C)₂HC) attached with a dash.

**Answer Choices:**
A) 0

**Explanation of Diagram:**

The chemical structure depicted in the image is a cyclohexane ring. It is illustrated with three substituents:

1. A methyl group (CH₃) is attached to one carbon of the cyclohexane using a wedge, indicating that it is pointing above the plane of the ring.
2. Two ethyl groups ((H₃C)₂HC and CH₂CH₃) are attached to different carbons via dashed lines, indicating they are pointing below the plane of the ring.

In the context of cyclohexane conformations, wedges typically indicate groups in the equatorial orientation, while dashes can either be equatorial or axial depending on the ring flipping. The question asks for the number of axial alkyl substituents in the most stable chair conformation.

Given the setup, with all substituents in the equatorial orientation in the lowest energy conformation, there are 0 axial alkyl substituents. This makes option A) 0, the correct answer.
Transcribed Image Text:**Question 37:** In the lowest energy conformation of the compound below, how many alkyl substituents are axial? [Diagram of a cyclohexane ring with three substituents]: - One methyl group (CH₃) attached with a wedge. - One ethyl group (CH₂CH₃) attached with a dash. - Another ethyl group ((H₃C)₂HC) attached with a dash. **Answer Choices:** A) 0 **Explanation of Diagram:** The chemical structure depicted in the image is a cyclohexane ring. It is illustrated with three substituents: 1. A methyl group (CH₃) is attached to one carbon of the cyclohexane using a wedge, indicating that it is pointing above the plane of the ring. 2. Two ethyl groups ((H₃C)₂HC and CH₂CH₃) are attached to different carbons via dashed lines, indicating they are pointing below the plane of the ring. In the context of cyclohexane conformations, wedges typically indicate groups in the equatorial orientation, while dashes can either be equatorial or axial depending on the ring flipping. The question asks for the number of axial alkyl substituents in the most stable chair conformation. Given the setup, with all substituents in the equatorial orientation in the lowest energy conformation, there are 0 axial alkyl substituents. This makes option A) 0, the correct answer.
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