Question

In square planar complex of co+2 ion, unpaired electrons are present in

Answer 1

Answer:1

Explanation:

Answer 2

Answer:

The number of unpaired electrons in the square planar complex of Co²⁺ ion is equal to one.

Explanation:

• The atomic number of Cobalt is 27. The electronic configuration of Co is [Ar] 3d⁷4s². The electronic configuration of Co²⁺ is [Ar] 3d⁷. So, it has seven electrons to be filled in d-orbitals.
• The order of d-orbital according their energies for the square planar complexes:

        $d_{yz}=d_{xz} < d_{z^2} < d_{xy} < d_{x^2-y^2}$

        The d- orbitals present at lower energy will be filled first.

• Therefore the seven electrons of  Co²⁺ ion will be filled as shown:

        $d\;^2_{yz}\;,d\;^2_{xz} \;,d\;^2_{z^2} \;, d\;^1_{xy}\; , d\;^0_{x^2-y^2}$

Therefore, one unpaired electron is present in dxy- orbital of  Co²⁺ ion of square planar complex, rest are paired.