Chemistry - STEREO ISOMERISM Question with Solution | TestHub
Match List-I, II, III with each other :
List - I | List - II | List - III |
|---|---|---|
(A)
| (1)
| (i) (2R, 3R) |
(B)
| (2)
| (ii) (2S,3S) |
(C)
| (3)
| (iii) (2S,3R) |
(D)
| (4)
| (iv) (2R,3S) |
Options:
Answer:
Solution:
Question Explanation:
The question asks to match Fischer projections (List I) with their corresponding sawhorse projections
(List II) and absolute configurations (List III).
Concept:
Interconversion of stereochemical representations and assignment of R/S configuration using CIP rules.
Solution:
In a Fischer projection, vertical bonds project away from the observer, while horizontal bonds project
toward the observer. After assigning priorities using CIP rules, the R/S configuration is determined. If
the lowest-priority group (4) lies on a horizontal bond, the assigned configuration must be inverted to
obtain the correct absolute configuration.
Final Answer:
Option (1)
(A) → (4) → (iii)
(B) → (3) → (iv)
(C) → (2) → (ii)
(D) → (1) → (i)