Coordination Compounds 2 Question 33
####35. The complex showing a spin only magnetic moment of $2.82 BM$ is
(2010)
(a) $Ni(CO) _4$
(b) $\left[NiCl _4\right]^{2-}$
(c) $Ni\left(PPh _3\right) _4$
(d) $\left[Ni(CN) _4\right]^{2-}$
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Answer:
Correct Answer: 35. (a)
Solution:
- Magnetic moment $=2.83 BM$ indicates that there is two unpaired electrons.
$$ u=\sqrt{n(n+2)} BM=\sqrt{8} BM=2.82 BM $$
$In\left[NiCl _4\right]^{2-}$, $Ni$ has $d^{8}$ configuration and $Cl^{-}$is a weak ligand :
