Question

Relationship between following pair of compounds?

• A. Enantiomer
• B. Identical
• C. Diastereomer
• D. Constitutional isomer

Answer 1

The Correct Option is B

Concept: Two structures represent identical molecules if they can be superimposed by simple rotation without changing connectivity. For stereochemical representations, wedge–dash structures may appear different but still represent the same configuration.
Step 1: Identify the chiral center The central carbon is attached to four different groups: \[ CH_3,\; Me,\; Br,\; Cl \] Thus the carbon is a stereogenic center.
Step 2: Compare orientations In the given structures, the positions of \(Br\) and \(Cl\) appear interchanged due to rotation of the molecule. However, no inversion of configuration occurs.
Step 3: Superimposition By rotating the molecule in space, structure (II) can be converted into structure (I). Thus both represent the same molecule. \[ \boxed{\text{The two structures are identical}} \]