Chemistry - STEREO ISOMERISM Question with Solution | TestHub
List - I | List - II |
|---|---|
(P)
| (1) Resolvable |
(Q) | (2) Mirror plane |
(R) | (3) Axis of symmetry ( ) |
(S) | (4) Non resolvable |
| (5) Inversion centre |
Options:
Answer:
Solution:
P. Bicyclo[2.2.1]heptane derivative
The molecule has a mirror plane that bisects the C₁-C₄ bond and passes through the midpoint of the C₂-C₃, C₅-C₆ bonds. It also has a axis of symmetry passing through the bridgehead atoms. Due to the presence of a mirror plane (plane of symmetry), the molecule is achiral and thus non-resolvable.
Q. Cyclohexane derivative (chair conformation)
This molecule has a mirror plane passing through the vertical axes of the chair conformation. It also possesses a axis of symmetry. The presence of a plane of symmetry makes the molecule achiral and non-resolvable.
R. Buta-1,3-diene
Buta-1,3-diene has a mirror plane that is the molecular plane itself. It also possesses an inversion center at the midpoint of the central C₂-C₃ bond in the trans conformation. Due to these symmetry elements, it is achiral and non-resolvable.
S. Adamantane derivative
This adamantane derivative has multiple mirror planes and an inversion center. The presence of these symmetry elements means the molecule is achiral and therefore non-resolvable.
