Q15 / 90 · JEE Main 2022 (29 Jul Shift 2) · Chemistry

Given below are two statements.

Statement I : The compound Figure is optically active.

Statement II : Figure​​​​​​​ is mirror image of above compound A.

In the light of the above statement, choose the most appropriate answer from the options given below.

  • A
    Both Statement I and Statement II are correct
  • B
    Both Statement I and Statement II are incorrect.
  • Correct answer
    C
    Statement I is correct but Statement II is incorrect.
  • D
    Statement I is incorrect but Statement II is correct.

Solution

Compound A is optically active due to the presence of chiral carbon

Figure

The R / S system is an important nomenclature system for denoting enantiomers. This approach labels each chiral center R or S according to a system by which its substituents are each assigned a priority, according to the Cahn–Ingold–Prelog priority rules (CIP), based on atomic number. When the center is oriented so that the lowest-priority substituent of the four is pointed away from the viewer, the viewer will then see two possibilities: if the priority of the remaining three substituents decreases in clockwise direction, it is labeled R (for Rectus, Latin for right); if it decreases in counterclockwise direction, it is S (for Sinister, Latin for left)

But the absolute configuration of both the molecules A and B is same that is S

Hence, Statement I is correct but Statement II is incorrect.

Hence, the correct answer is option: 'C'.

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