If there is no rotation of plane-polarized light by a compound in a specific solvent, thought to be chiral, it may mean that
If there is no rotation of plane-polarized light by a compound in a specific solvent, thought to be chiral, it may mean that
Due to the rotation of plane polarised light caused by an optically active molecule, the substance can be a racemic combination. However, the optically active chemical loses its optical activity as a result of some external compensation (heat, light, catalyst, solvent, etc.). Due to an intramolecular rearrangement, the molecule then exists as a racemic mixture, meaning that both the d and l forms are present in the solution. Therefore, plane polarised light is not rotated, the compound has no asymmetric centre, and when it forms the symmetric centre once more, both the d and l forms are acquired in an equal amount.
Conclusion: Hence, option (B) is the correct answer.
Due to the rotation of plane polarised light caused by an optically active molecule, the substance can be a racemic combination. However, the optically active chemical loses its optical activity as a result of some external compensation (heat, light, catalyst, solvent, etc.). Due to an intramolecular rearrangement, the molecule then exists as a racemic mixture, meaning that both the d and l forms are present in the solution. Therefore, plane polarised light is not rotated, the compound has no asymmetric centre, and when it forms the symmetric centre once more, both the d and l forms are acquired in an equal amount.
Conclusion: Hence, option (B) is the correct answer.
