Q.

Discuss the nature of bonding in the coordination entity, [Co(C2O4)3]3- on the basis of valence bond theory. Also, comment on the hybridization and magnetic behavior of the given entity.

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Detailed Solution

[Co(C2O4)3]3- 

The oxidation state of Co is +3.  

Outer configuration of Co = 3d7 4s2 

Co3+ = 3d6 4s0 

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Oxalate ion being a strong field ligand pairs up the 3d-electrons, thus two out of the five 3d-orbitals are available for oxalate ions. 

C:\Users\q\Desktop\Capture.JPG 

Thus, the hybridization of given entity is d2sp3. Since, all the electrons are paired, the complex is diamagnetic 

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