See image — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

# Analysis of Isomerism Type **Step 1: Identify the molecular formula** Both compounds have the same molecular formula: $C_{13}H_{18}SO_3$ **Step 2: Analyze the structural difference** - **Left structure**: Phenyl group ($C_6H_5$) directly attached to the sulfur of $SO_2$ group; cyclohexyl group ($C_6H_{11}$) attached to oxygen - **Right structure**: Cyclohexyl group attached to sulfur; phenyl group attached to oxygen **Step 3: Determine the type of isomerism** The two compounds differ in the **position of functional groups relative to the same carbon skeleton**: - Phenyl and cyclohexyl groups have exchanged positions with respect to the $SO_2$ group - The molecular connectivity/skeleton remains the same - Only the attachment positions of substituents change **Step 4: Eliminate other options** - **(A) Chain isomerism**: Would require different carbon chain arrangements ✗ - **(C) Metamerism**: Would require different positions of heteroatom in identical chains ✗ - **(D) Functional group isomerism**: Would require different functional groups ✗ **Answer: (B) Positional isomerism** — The isomers differ in the positions where the aromatic and alicyclic groups are attached to the sulfone moiety.