Chemistry - Coordination Chemistry Question with Solution | TestHub

[Fe(en)₂Cl₂]⁺ is an octahedral complex with two bidentate en ligands and two Cl⁻ ligands.

It shows geometrical isomerism due to cis and trans forms.

The cis form is chiral because of the arrangement of en ligands and exists as optical isomers (d and l forms).

Hence, it shows both geometrical and optical isomerism.

Other complexes:

[Fe(en)₃]³⁺ → optical isomerism only.

[Pt(NH₃)₄Cl₂]²⁺ → geometrical isomerism only (square planar).

[RhCl(PPh₃)CO(NH₃)] → geometrical possibilities but no optical isomerism.

Correct Answer: (A) [Fe(en)₂Cl₂]⁺