24. Transition Metals and Coordination Compounds

The following diagram shows crystal field splitting pattern for a complex. Which one of the complexes given below should best match the given diagram?

Draw a crystal field energy-level diagram for the 3d orbitals of titanium in [Ti(H₂O)₆]³⁺]. Indicate the crystal field splitting, and explain why is [Ti(H₂O)₆]³⁺] colored.

The [Cr(H₂O)₆]³⁺ ion is violet, and [Cr(CN)₆]^3- is yellow. Explain this difference using crystal field theory. Use the colors to order H₂O and CN^- in the spectrochemical series.

The Ni²⁺(aq) cation is green, but Zn²⁺(aq) is colorless. Explain.

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Look at the colors of the isomeric complexes in Figure 21.12, and predict which is the stronger field ligand, nitro (-NO₂) of nitrito (-ONO). Explain. 

What is the crystal field energy level diagram for the complex [Fe(NH₃)₆]³⁺?

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Construct the octahedral crystal-field splitting diagram for the metal in each species.