Q. Which one of the following complexes is not expected to exhibit isomerism?
A) [Ni(NH₃)₄(H₂O)₂]²⁺
B) [Pt(NH₃)₂Cl₂]
C) [Ni(NH₃)₂Cl₂]
D) [Ni(en)₃]²⁺
Explanation
[Solution from source] [Ni(NH₃)₂Cl₂] is tetrahedral, and an MA₂B₂ tetrahedral complex shows no geometrical or optical isomers. [Ni(NH₃)₄(H₂O)₂]²⁺ (octahedral MA₄B₂) and square planar [Pt(NH₃)₂Cl₂] show cis-trans isomerism, and [Ni(en)₃]²⁺ is optically active. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.