Question

3)      Consider [Co(H2O)6]2+   and [Cr(C2O4)3]3-   complex ions

a)       Calculate the splitting energies of these complex ions.

b)      Compare your results with pairing energies of these metal ions and decide whether the ligands are weak field or strong field ligands.

c)       Calculate the crystal field stabilization energy for each compound.

Complex

λ1

λ2

λ3

Pairing   Energy (Kj/mol)

[Co(H2O)6]2+

510

460

-

250. 0

[Cr(C2O4)3]3-

565

415

266

244.3


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