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  • Please help! Of the following complex ions, which is diamagnetic in nature?

Of the following complex ions, which is diamagnetic in nature?

  • Option 1)

    \left [ NiCl_{4} \right ]^{2-}

  • Option 2)

    \left [ Ni(CN)_{4} \right ]^{2-}

  • Option 3)

    \left [ CuCl_{4} \right ]^{2-}

  • Option 4)

    \left [ CoF_{6} \right ]^{3-}

 

Answers (2)

As we learnt in

Strong Field Ligand -

These are the ligands which pair the electron in inner d-orbital and makes required d-orbitals empty/available. 

- wherein

For example: CO, CN etc

 

 Electronic configuration of Ni2+ : 3d8 4s°

Since CN- is a strong field ligand, the d electrons will pair up and leave one d orbital vacant for dsp2 hybridization

\therefore find e -  config \therefore
 

Since, there are no unpaired e-s in [Ni (CN)4]2-

So, it is diamagnetic.

 

 


Option 1)

\left [ NiCl_{4} \right ]^{2-}

this option is incorrect

Option 2)

\left [ Ni(CN)_{4} \right ]^{2-}

this option is correct

Option 3)

\left [ CuCl_{4} \right ]^{2-}

this option is incorrect

Option 4)

\left [ CoF_{6} \right ]^{3-}

this option is incorrect

Posted by

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