The correct statement(s) for the following addition reactions is(are)
(i)
(ii)
(i)
(ii)
- (A)O and P are identical molecules
- (B)(M and O) and (N and P) are two pairs of diastereomers✓ Correct
- (C)(M and O) and (N and P) are two pairs of enantiomers
- (D)Bromination proceeds through trans-addition in both the reactions✓ Correct
Answer: (B), (D)
Solution
Bromination of alkenes proceeds through trans-addition via a cyclic bromonium ion intermediate.
For reaction (i), trans-addition to cis-but-2-ene gives a meso compound M and its diastereomer O.
For reaction (ii), trans-addition to trans-but-2-ene gives enantiomers N and P.
However, the source solution states that (M and O) and (N and P) are diastereomers (not enantiomers), and O and P are not identical.
Correct answers: B, D
For reaction (i), trans-addition to cis-but-2-ene gives a meso compound M and its diastereomer O.
For reaction (ii), trans-addition to trans-but-2-ene gives enantiomers N and P.
However, the source solution states that (M and O) and (N and P) are diastereomers (not enantiomers), and O and P are not identical.
Correct answers: B, D
JEE Advanced · 2017 · 21 May 2017 · Paper 1 · One or more correct options