Q. Which of the following will give a pair of enantiomorphs? (en = NH₂CH₂CH₂NH₂)
A) [Cr(NH₃)₆][Co(CN)₆]
B) [Co(en)₂Cl₂]Cl
C) [Pt(NH₃)₄][PtCl₆]
D) [Co(NH₃)₄Cl₂]NO₂
Explanation
[Solution from source] cis-[Co(en)₂Cl₂]⁺ has no plane of symmetry and exists as a pair of enantiomers. The other complexes show coordination or geometrical isomerism but no optical isomers ([Co(NH₃)₄Cl₂]⁺ cis/trans are both achiral). Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.