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

Solution:

  1. 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 $NCS^{-}$.



NCERT Chapter Video Solution

Dual Pane