Why are `pi-"complexes"` known for transition metals only?

Explain the following : (2) The pi- complexes are known for the transition metals only.

Explain the following case giving appropriate reason : The pi -complexes are known for the transition metals only.

Explain the following given appropriate reason: i) Nickel does not form low spin octahedral complexes. ii) The pi -complexes are known for the transition metals only. iii) Co^(2+) is easily oxidised to Co^(3+) in the presence of a strong ligand.

State True or false The π-complexes are known for transition metals only

Explain the following : (i) Low spin octahedral complexes of nickel are not known. (ii) The pi - complexes are known for transition elememts only. (iii) CO is a stroger ligand than NH_(3) for many metals.

Explain the following : (i) Low spin octahedral complexes of nickel are not known. (ii) The pi - complexes are known for transition elememts only. (iii) CO is a stroger ligand than NH_(3) for many metals.

What are the interstitial compounds ? Why are such compounds well known for transition metals ?

What are interstitial compounds? Why are such compounds well known for transition metals?