(a) 5. Assign the R and S configurations for all stereogenic centers in the following BI H H₂C Br Br * CH₂ R CH(CH₂)₂ CHIOH H H SH CH₂ CH=CH₂ R H- C=CCH₂ CH₂CH₂CH₂CI CH₂CH₂Cl () HẠNH CH₂CH₂Cl (C) C

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Chapter1: Chemical Foundations
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The image shows a series of chemical structures with stereogenic centers indicated for the purpose of assigning R and S configurations. Below is a transcription and description of the structures:

1. **Structure (a):**
   - A carbon is bonded to a bromine (Br) with a wedged bond, hydrogen (H) with a dashed bond, a CH group with a C(CH₃)₂ branch, and a separate CH(CH₃)₂ group.
   - The carbon with a star (*) indicates a stereogenic center.

2. **Structure (b):**
   - Two central carbons are shown, each bonded to a bromine (one on the left and one on the right), with hydrogens (H) oriented differently to show stereochemistry.
   - Labels "S" and "R" indicate the configuration of each stereogenic center.

3. **Structure (c):**
   - A carbon chain with chlorine atoms (Cl) on branches and multiple stereogenic centers marked by wedges and dashed lines.
   - The spatial arrangement of substituents is depicted, showing chirality.

4. **Structure (d):**
   - A nitrogen (NH) with bonds to CH₃, a CH₃CHCl group, and a carbon with CH₃CH₂OH groups.
   - The chiral centers are annotated with "R" for the specified configuration.

These structures are used to practice assigning R/S nomenclature in stereochemistry, which is crucial for understanding and describing the 3D orientation of molecular structures.
Transcribed Image Text:The image shows a series of chemical structures with stereogenic centers indicated for the purpose of assigning R and S configurations. Below is a transcription and description of the structures: 1. **Structure (a):** - A carbon is bonded to a bromine (Br) with a wedged bond, hydrogen (H) with a dashed bond, a CH group with a C(CH₃)₂ branch, and a separate CH(CH₃)₂ group. - The carbon with a star (*) indicates a stereogenic center. 2. **Structure (b):** - Two central carbons are shown, each bonded to a bromine (one on the left and one on the right), with hydrogens (H) oriented differently to show stereochemistry. - Labels "S" and "R" indicate the configuration of each stereogenic center. 3. **Structure (c):** - A carbon chain with chlorine atoms (Cl) on branches and multiple stereogenic centers marked by wedges and dashed lines. - The spatial arrangement of substituents is depicted, showing chirality. 4. **Structure (d):** - A nitrogen (NH) with bonds to CH₃, a CH₃CHCl group, and a carbon with CH₃CH₂OH groups. - The chiral centers are annotated with "R" for the specified configuration. These structures are used to practice assigning R/S nomenclature in stereochemistry, which is crucial for understanding and describing the 3D orientation of molecular structures.
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