Coordination Compounds 2 Question 10
11. The magnetic moment of an octahedral homoleptic $Mn(II)$ complex is $5.9$ BM. The suitable ligand for this complex is
(a) $CN^{-}$
(b) ethylenediamine
(c) $NCS^{-}$
(d) $CO$
Show Answer
Answer:
Correct Answer: 11. (c)
Solution:
- The magnetic moment of the magnitude $5.9$ BM suggest the presence of $5$ unpaired electrons in $Mn(II)$. This can be cross verified by putting the value $(5)$ of unpaired electrons in the formula, $\mu=\sqrt{n(n+2)}$ BM
Thus, the valence electronic configuration of $Mn(II)$ in the complex is
The octahedral homoleptic complex suggests $s p^{3} d^{2}$-hybridisation in the complex, i.e.
Thus, $5$ unpaired electrons are present in the complex which suggest the presence of a weak ligand like $NCS^{-}$.
BETA
