Select the option with correct property, Coordination Compounds

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Q.
Select the option with correct property - [2024]

1 $[Ni {(CO)}_{4}]$ and ${[{NiCl}_{4}]}^{2 -}$ both Paramagnetic

2 $[Ni {(CO)}_{4}]$ and ${[{NiCl}_{4}]}^{2 -}$ both Diamagnetic

3 $[Ni {(CO)}_{4}]$ Diamagnetic. ${[{NiCl}_{4}]}^{2 -}$ Paramagnetic

4 ${[{NiCl}_{4}]}^{2 -}$ Diamagnetic. $[Ni {(CO)}_{4}]$ Paramagnetic

Ans.
(3)

In ${[{NiCl}_{4}]}^{2 -}$ oxidation number of Ni = +2

${Ni}^{2 +} : {}_{18}{[Ar] 3 d^{8}}$

$C l^{-}$ is weak field ligand.

As it contains unpaired electrons, it is paramagnetic.

In $[Ni {(CO)}_{4}]$ oxidation number of Ni = 0

${}_{28}{Ni} = {}_{18}{[Ar] 3 d^{8} 4 s^{2}}$

CO is a strong field ligand.

As all electrons are paired, it is diamagnetic.

Solution

Q.
Select the option with correct property - [2024]

1 $[Ni {(CO)}_{4}]$ and ${[{NiCl}_{4}]}^{2 -}$ both Paramagnetic

2 $[Ni {(CO)}_{4}]$ and ${[{NiCl}_{4}]}^{2 -}$ both Diamagnetic

3 $[Ni {(CO)}_{4}]$ Diamagnetic. ${[{NiCl}_{4}]}^{2 -}$ Paramagnetic

4 ${[{NiCl}_{4}]}^{2 -}$ Diamagnetic. $[Ni {(CO)}_{4}]$ Paramagnetic

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Solution

Q. Select the option with correct property - [2024]

1 [Ni(CO)4] and [NiCl4]2- both Paramagnetic

2 [Ni(CO)4] and [NiCl4]2- both Diamagnetic

3 [Ni(CO)4] Diamagnetic. [NiCl4]2- Paramagnetic

4 [NiCl4]2- Diamagnetic. [Ni(CO)4] Paramagnetic

Ans. (3) In [NiCl4]2- oxidation number of Ni = +2 Ni2+:[Ar]3d818 Cl- is weak field ligand. As it contains unpaired electrons, it is paramagnetic. In [Ni(CO)4] oxidation number of Ni = 0 Ni28=[Ar]3d84s218 CO is a strong field ligand. As all electrons are paired, it is diamagnetic.

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Q.
Select the option with correct property - [2024]

1 $[Ni {(CO)}_{4}]$ and ${[{NiCl}_{4}]}^{2 -}$ both Paramagnetic

2 $[Ni {(CO)}_{4}]$ and ${[{NiCl}_{4}]}^{2 -}$ both Diamagnetic

3 $[Ni {(CO)}_{4}]$ Diamagnetic. ${[{NiCl}_{4}]}^{2 -}$ Paramagnetic

4 ${[{NiCl}_{4}]}^{2 -}$ Diamagnetic. $[Ni {(CO)}_{4}]$ Paramagnetic