See image — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

# Solution: Stereoisomeric Relationship **Step 1: Identify the chiral centers** Both molecules have one chiral center (the central carbon bearing four different groups: $CH_3$, $H$, $Br$, and $OH$/$Cl$). **Step 2: Analyze the first structure** - $CH_3$ (top) - $H$-$Br$ (wedge-dash) - $H$-$OH$ (wedge-dash) - $H$-$Cl$ (wedge-dash) - $CH_3$ (bottom) **Step 3: Analyze the second structure** - $CH_3$ (top) - $Br$-$H$ (wedge-dash) - $HO$-$H$ (wedge-dash) - $Cl$-$CH_3$ (wedge-dash) - $H$ (bottom) **Step 4: Assign stereochemistry using CIP rules** For the first compound: $(1R, 2S)$ or $(1S, 2R)$ configuration For the second compound: Opposite stereochemistry at one or both centers **Step 5: Determine the relationship** - These are **NOT** identical (different 3D arrangements) - They have the **same molecular formula** but differ in stereochemistry - They are **NOT** enantiomers (not mirror images of each other) - They differ at stereogenic centers but are not mirror images **Answer: (B) They are diastereomers** — stereoisomers that are not mirror images of each other, differing in configuration at one or more stereogenic centers.