Question

The magnetic moment of a compound of Mn is 5.92
BM What is the charge on metal cation in this
compound
​

Answer 1

Answer:

In the compound, the overall charge on the coordination sphere is -2, the charge by the 4 Cl ligands is -4, so the Oxidation no. of Central Metal Atom Mn will be +2.

Explanation:

In the compound, the overall charge on the coordination sphere is -2, the charge by the 4 Cl ligands is -4, so the Oxidation no. of Central Metal Atom Mn will be +2.

Mn(25) =

3d ^{5} \: 4s^{2}3d

5

4s

2

Now +2 charge on Mn means only

3d^{5}3d

5

All these five electrons will be unpaired.

Now Magnetic Moment =

\sqrt{n(n + 2)}

n(n+2)

where n=no. of unpaired electrons.

Here, n=5

So,

\begin{gathered}\sqrt{5(5 + 2)} \\ = \sqrt{5 \times 7} \\ = \sqrt{35} \\ = 5.916 \:\end{gathered}

5(5+2)

=

5×7

=

35

=5.916

M.M. = 5.92 B.M.

Answer 2

Answer:

In the compound, the overall charge on the coordination sphere is -2, the charge by the 4 Cl ligands is -4, so the Oxidation no. of Central Metal Atom Mn will be +2.