Q. The complex which has facial and meridional isomers is (Given : py = pyridine and en = H₂N–CH₂–CH₂–NH₂)
A) [Ni(en)₂(H₂O)₂]²⁺
B) [Cr(py)₃(Cl)₃]
C) [Cr(H₂O)₆]³⁺
D) [Co(NH₃)₄(H₂O)₂]³⁺
Explanation
[Solution from source] Fac–mer isomerism arises in octahedral complexes of type MA₃B₃: [Cr(py)₃Cl₃]. The MA₄B₂ and M(AA)₂B₂ types show cis–trans isomerism, and [Cr(H₂O)₆]³⁺ has no geometrical isomers. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.