07 6₂ П CH2OH Br Br d. S -H CI H CH₂CH3 C/ RXO H H3C/ Br C Br 2 Br H CH₂OH Xx O CI Br CH₂CH3 R CI Br Br

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Chapter1: Chemical Foundations
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hey could someone help me check my work on if I have the right S and R chiral configurations for the first two problems and help me figure out the last two? I’m lost on how to do those, thank you!
The image showcases various chemical structures and stereochemistry notations relevant to organic chemistry. Below is a description of each part of the content:

### Chemical Structures and Stereochemistry:

1. **Top-Left Structure:**
   - A three-dimensional representation of a molecule featuring a central carbon atom bonded to a hydrogen (H), a chlorine (Cl), and another group.
   - The steric configuration is noted with the "S" label, indicating its stereoisomerism.
   - The arrows indicate the priority of substituents around the chiral center.

2. **Top-Middle Structure:**
   - This structure involves another chiral carbon with a chlorine, a hydrogen, and an ethyl group (CH₃CH₂).
   - It is labeled with "R" indicating the opposite stereochemical configuration to the first structure.
   - The numbering indicates the order of priority based on Cahn–Ingold–Prelog rules.

3. **Top-Right Structures:**
   - There are Fischer projection representations with two chiral centers. 
   - The left structure is labeled, indicating priorities and the direction of rotation (either R or S).
   - The right structure includes similar notations and discusses the relative configurations at both chiral centers.

### Cyclohexane Derivatives:

4. **Bottom-Left Structure:**
   - Cyclohexane with two chlorine atoms attached, illustrating its stereochemistry with bold and dashed lines to differentiate between axial and equatorial positions.

5. **Bottom-Middle Structure:**
   - Another cyclohexane derivative highlighting the positioning of chlorine groups on the ring.

6. **Bottom-Right Structures:**
   - A pair of cyclohexane rings with bromine substituents, demonstrating the ring flipping concept. 
   - The use of wedges and dashes conveys stereochemical orientations.

These structural representations are typically used in teaching the concepts of stereochemistry, including chiral centers, Fischer projections, and the 3D orientation of molecules. This is essential for understanding the fundamentals of organic chemistry and molecular interactions.
Transcribed Image Text:The image showcases various chemical structures and stereochemistry notations relevant to organic chemistry. Below is a description of each part of the content: ### Chemical Structures and Stereochemistry: 1. **Top-Left Structure:** - A three-dimensional representation of a molecule featuring a central carbon atom bonded to a hydrogen (H), a chlorine (Cl), and another group. - The steric configuration is noted with the "S" label, indicating its stereoisomerism. - The arrows indicate the priority of substituents around the chiral center. 2. **Top-Middle Structure:** - This structure involves another chiral carbon with a chlorine, a hydrogen, and an ethyl group (CH₃CH₂). - It is labeled with "R" indicating the opposite stereochemical configuration to the first structure. - The numbering indicates the order of priority based on Cahn–Ingold–Prelog rules. 3. **Top-Right Structures:** - There are Fischer projection representations with two chiral centers. - The left structure is labeled, indicating priorities and the direction of rotation (either R or S). - The right structure includes similar notations and discusses the relative configurations at both chiral centers. ### Cyclohexane Derivatives: 4. **Bottom-Left Structure:** - Cyclohexane with two chlorine atoms attached, illustrating its stereochemistry with bold and dashed lines to differentiate between axial and equatorial positions. 5. **Bottom-Middle Structure:** - Another cyclohexane derivative highlighting the positioning of chlorine groups on the ring. 6. **Bottom-Right Structures:** - A pair of cyclohexane rings with bromine substituents, demonstrating the ring flipping concept. - The use of wedges and dashes conveys stereochemical orientations. These structural representations are typically used in teaching the concepts of stereochemistry, including chiral centers, Fischer projections, and the 3D orientation of molecules. This is essential for understanding the fundamentals of organic chemistry and molecular interactions.
Expert Solution
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The absolute configuration (R/S) of an organic compound can be determined using Cahn-Ingold-Prelog rules based on atomic number.

 

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