Question

For three compounds of Mn 

MnF₂, MnF₃, MnF₄ 

Find magnetic moment (Spin only) for the compound which has highest oxidising tendency. 

[Report your answer to nearest integer]

Answer 1

The change from Mn²⁺ to Mn³⁺ results in the half-filled (d⁵) configuration which has extra stability. 

So, MnF₃ has most oxidising tendency.

MnF₃ ⇒ Mn³⁺ ⇒ 3d⁴  n = 4

\(\mu = \sqrt{4(4 + 2)} = \sqrt{24}BM\)

\(= 4.89 \approx 5BM\)