Question

The correct relationship between the molecules X and Y is that, they are _ _ _.

• A. regioisomers
• B. diastereomers
• C. enantiomers
• D. identical molecules

Hint:

If all chiral centers are inverted → enantiomersIf only some are inverted → diastereomers

Answer 1

The Correct Option is B

Step 1: Identify stereocenters.
Both molecules X and Y contain multiple stereocenters (chiral centers) in the ring systemThus, stereoisomerism is possible

Step 2: Compare spatial arrangement.
On comparing X and Y, we observe that the configuration at one or more stereocenters is different, but not all stereocenters are inverted

Step 3: Apply definition.
\[ \text{Enantiomers} \rightarrow \text{All stereocenters inverted (mirror images)} \] \[ \text{Diastereomers} \rightarrow \text{Some but not all stereocenters differ} \] Since X and Y are not mirror images of each other but differ in configuration at certain stereocenters, they are diastereomers

Step 4: Eliminate other options.
Regioisomers differ in position of functional groups, which is not the case hereIdentical molecules would have same configuration at all centers

Step 5: Conclusion.
\[ \boxed{\text{diastereomers}} \]