9) Which of the following compounds has an S configuration? CI Br CH3 CH3 CH3 HO, H C2H5 H CH2CH2CH3 CH3 H ČH3 D A B

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**Question 9:** Which of the following compounds has an S configuration?

**Compound A:**

- Structure: A chiral center with a central carbon.
- Substituents: Methyl (CH₃), ethyl (C₂H₅), hydrogen (H), and hydroxyl group (OH).

**Compound B:**

- Structure: A chiral center with a central carbon.
- Substituents: Bromine (Br), hydrogen (H), chlorine (Cl), and methyl (CH₃).

**Compound C:**

- Structure: A chiral center with a central carbon.
- Substituents: Bromine (Br), a propyl group (CH₂CH₂CH₃), two methyl groups (CH₃).

**Compound D:**

- Structure: A chiral center with a central carbon.
- Substituents: Chlorine (Cl), hydrogen (H), methyl (CH₃), hydrogen (H).

Each compound contains a chiral center with various substituents that determine its configuration as either R or S according to Cahn-Ingold-Prelog priority rules. To identify the S configuration, the priorities of the substituents must be determined based on atomic number and connectivity. Visual cues, such as solid and dashed wedges, indicate the spatial arrangement needed to apply the R/S rules.
Transcribed Image Text:**Question 9:** Which of the following compounds has an S configuration? **Compound A:** - Structure: A chiral center with a central carbon. - Substituents: Methyl (CH₃), ethyl (C₂H₅), hydrogen (H), and hydroxyl group (OH). **Compound B:** - Structure: A chiral center with a central carbon. - Substituents: Bromine (Br), hydrogen (H), chlorine (Cl), and methyl (CH₃). **Compound C:** - Structure: A chiral center with a central carbon. - Substituents: Bromine (Br), a propyl group (CH₂CH₂CH₃), two methyl groups (CH₃). **Compound D:** - Structure: A chiral center with a central carbon. - Substituents: Chlorine (Cl), hydrogen (H), methyl (CH₃), hydrogen (H). Each compound contains a chiral center with various substituents that determine its configuration as either R or S according to Cahn-Ingold-Prelog priority rules. To identify the S configuration, the priorities of the substituents must be determined based on atomic number and connectivity. Visual cues, such as solid and dashed wedges, indicate the spatial arrangement needed to apply the R/S rules.
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