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Question
What can be inferred from the magnetic moment value of the following complex species?
| Example | Magnetic Moment (BM) |
| K2[MnCl4] | 5.9 |
Solution
Magnetic Moment (μ) = `sqrt("n"("n" + 2))` BM
When n = 1, μ = `sqrt(1(1 + 2))` = 1.73 BM ≈ 2
When n = 2, μ = `sqrt(2(2 + 2)` = 2.83 BM ≈ 3
When n = 3, μ = `sqrt(3(3 + 2))` = 3.87 BM ≈ 4
When n = 4, μ = `sqrt(4(4 + 2))` = 4.90 BM ≈ 5
When n = 5, μ = `sqrt(5(5 + 2))` = 5.92 BM ≈ 6
K2[MnCl4]: μ = 5.9 BM, Mn2+ ion has 5 unpaired electrons. Its orbital diagram is:
| 3d | ||||
| ↑↓ | ↑ | ↑ | ↑ | ↑ |
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