Which one of the following are different from the others? H un CH3 you Br CH3CH2- 1 H Br CH3 CH₂CH3 2 CH₂CH3 H Came H 3 'Br Br Hy CH₂CH₂ CH3

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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Question:**

Which one of the following are different from the others?

**Structures:**

1. CH₃CH₂ (attached to a carbon with) H and Br in wedged and dashed bonds, respectively, and another CH₃.
   
2. Br (attached to a carbon with) H in wedged, CH₂CH₃ in dashed, and CH₃.
   
3. CH₂CH₃ (attached to a carbon with) H in dashed, Br in wedged, and another CH₃.
   
4. Br (attached to a carbon with) CH₃, H in dashed, and CH₂CH₃ in wedged.

**Options:**

- ○ 1
- ○ 2
- ○ 3
- ○ 4

**Explanation:**

This is a stereochemistry question focusing on the arrangement of atoms in 3D space, using wedge-and-dash notation to indicate different spatial orientations. The aim is to determine which structure is different, suggesting an enantiomer or a structural isomer among the given options.
Transcribed Image Text:**Question:** Which one of the following are different from the others? **Structures:** 1. CH₃CH₂ (attached to a carbon with) H and Br in wedged and dashed bonds, respectively, and another CH₃. 2. Br (attached to a carbon with) H in wedged, CH₂CH₃ in dashed, and CH₃. 3. CH₂CH₃ (attached to a carbon with) H in dashed, Br in wedged, and another CH₃. 4. Br (attached to a carbon with) CH₃, H in dashed, and CH₂CH₃ in wedged. **Options:** - ○ 1 - ○ 2 - ○ 3 - ○ 4 **Explanation:** This is a stereochemistry question focusing on the arrangement of atoms in 3D space, using wedge-and-dash notation to indicate different spatial orientations. The aim is to determine which structure is different, suggesting an enantiomer or a structural isomer among the given options.
Expert Solution
Step 1: Interpretation of given problem

Given are organic compounds. 

Different compounds have different absolute configurations. 

We determine R and S configuration by Cahn-Ingold-Prelog rules.

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