Which of the given statement(s) about $\mathbf{N}, \mathbf{O}, \mathbf{P}$ and $\mathbf{Q}$ with respect to $\mathbf{M}$ is (are) correct? (A) $\mathbf{M}$ and $\mathbf{N}$ are non-mirror image stereoisomers (B) $\mathbf{M}$ and $\mathbf{O}$ are identical (C) M and P are enantiomers (D) $\mathbf{M}$ and $\mathbf{Q}$ are identical

(A) $\mathbf{M}$ and $\mathbf{N}$ are non-mirror image stereoisomers; (B) $\mathbf{M}$ and $\mathbf{O}$ are identical; (C) M and P are enantiomers

(D) $\mathbf{M}$ and $\mathbf{Q}$ are identical

JEE Advanced · 2012 · 08 Apr 2012 · Paper 2 · General Organic Chemistry

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Which of the given statement(s) about

N, O, P

and

Q

with respect to

M

is (are) correct?

(A)

M

and

N

are non-mirror image stereoisomers
(B)

M

and

O

are identical
(C) M and P are enantiomers
(D)

M

and

Q

are identical

(A) $M$ and $N$ are non-mirror image stereoisomers✓ Correct
(B) $M$ and $O$ are identical✓ Correct
(C)M and P are enantiomers✓ Correct
(D) $M$ and $Q$ are identical

Answer: (A), (B), (C)

Solution

Converting all structures to Fischer projections: M and N are diastereomers (non-mirror image stereoisomers with different configurations at one or more stereocenters), so (A) is correct. M and O are identical (same configuration at both stereocenters), so (B) is correct. M and P are enantiomers (mirror images with opposite configurations at all stereocenters), so (C) is correct. M and Q are diastereomers (not identical), so (D) is incorrect. The answer is (A), (B), (C).

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JEE Advanced · 2012 · 08 Apr 2012 · Paper 2 · General Organic Chemistry

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