The number of unpaired d - electrons in the central atom of Complex \left [ Cr(H_{2}O)_{6} \right ]^{3+} 

is (Atomic number of H=1)

  • Option 1)

    2

  • Option 2)

    4

  • Option 3)

    3

  • Option 4)

    5

 

Answers (1)

As we learnt in 

Weak field Ligand -

These are the ligands which do not pair the electron in inner d-orbital.

- wherein

For example: N_{2}O, F^{-}, Cl^{-} etc    

 

 

 \left [ Cr(H_{2}O)_{6} \right ]^{3+}

Electronic configuration of Cr3+ : 3d4s0

H2O is a weak field Ligand

Therefore we have 

 

 


Option 1)

2


This option is incorrect 

Option 2)

4


This option is incorrect 

Option 3)

3


This option is correct 

Option 4)

5


This option is incorrect 

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