The complex showing a spin only magnetic moment of (2.82, BM... | Chemistry | SolveeIt

Question

The complex showing a spin only magnetic moment of $2.82\, BM$ is

$Ni(CO)_4$

$[NiCl_4]^{2-}$

$Ni(PPh_3)_4$

$[Ni(CN)_4]^{2-}$

Answer

$[NiCl_4]^{2-}$

Explanation

Solution

Magnetic moment $=2.83 \,BM$
indicates that there is two unpaired electrons.
$\mu = \sqrt {n(n+2)} BM= \sqrt 8\, BM=2.82\, BM$
In $[NiCI_4]^{2-},Ni \,$ has $d^8$ configuration
and $Cl^-$ is a weak ligand:

Chemistry Question on coordination compounds

Solution