Chemistry - Coordination Chemistry Question with Solution | TestHub

Identify the Complex Type: The given structure represents a coordination complex of the type $[Co(N{H}_3{)}_3(N{O}_2{)}_3]$, which is an $M{A}_3{B}_3$ type octahedral complex.

Understand Isomerism: This type of complex can exist in two geometrical forms: facial (fac) and meridional (mer).

Analyze the Geometry: In the provided structure, two identical nitro (–NO₂) ligands are positioned opposite to each other, occupying trans positions along a straight line through the central Cobalt atom.

Conclusion: Since three identical ligands form a meridian around the octahedral sphere rather than a triangular face, it is designated as the meridional-form.