Chemistry - Coordination Chemistry Question with Solution | TestHub
Select correct sketch(s) of opticaly active isomer of
Options:(select one or more)
Answer:
Solution:
To determine the optically active isomers of , we look for structures that lack a plane of symmetry (POS) or a center of inversion.
Solution:
Option (A) is correct: This is a cis-cis-cis isomer. The arrangement of ligands is asymmetrical, meaning no plane can divide the molecule into two identical halves, making it chiral and optically active.
Option (B) is correct: This is another cis-isomer configuration where the ethylenediamine (en) ring and other ligands are positioned such that there is no plane of symmetry. Like option (A), it is non-superimposable on its mirror image.
Option (C) is incorrect: In this sketch, the two Cl⁻ ligands are trans to each other (180° apart). This creates a vertical plane of symmetry passing through the Co and the en ring, rendering the molecule achiral and optically inactive.
Option (D) is incorrect: Here, the two NH₃ groups are trans to each other. This linear arrangement creates a plane of symmetry (the molecular plane containing Co, en, and Cl atoms), which makes the isomer optically inactive.