Coordination Compounds

Short Answer Type

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Why does [CoF6]3– give a high spin complex?

Cobalt exists in the +3 oxidation state.

Fluorine ion is a weak ligand. It cannot cause the pairing of the 3d electrons. As a result, the Co3+ ion will undergo sp3d2 hybridzation.

The complex formation involves d-orbitals of the outershell which give a high spin complex. 
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    Write the IUPAC name of [Ni(H2O)6] (ClO4)2.

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    What is the significance of Δ0?

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    Give the name of following complex using IUPAC norms:
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    Square planar complexes do not show optical isomerism. Why?

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