Which complex exhibits geometrical isomerism?
- [Ni(CN)₄]²⁻
- [Co(NH₃)₆]³⁺
- [Pt(NH₃)₂Cl₂]
- [Fe(CN)₆]⁴⁻
Answer: [Pt(NH₃)₂Cl₂]
Square planar [Pt(NH₃)₂Cl₂] shows cis-trans isomerism. Tetrahedral/octahedral symmetric complexes don't. Important for stereochemistry in coordination compounds. [[NCERT Chemistry Class 12]]