8.48 What can be inferred from the magnetic moment values of the following complex species ?

Example

Magnetic moment

[K₄ [Mn(CN)₆]

2.2

[Fe(H₂O)₆]^2+.

5.3

K₂ [MnCl₄]

5.9

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Payal Gupta | Contributor-Level 10

8 months ago

8.48 To calculate magnetic moment of the complex species, we use the spin formula:

μ =√n(n+2) BM

When n= 1

⇒ μ = √1(1+2)

⇒ u= √3⇒

u=1.73 BM

When n=2

⇒ μ = √2(2+2)

⇒ μ = √8

⇒ μ = 2.83 BM

When n= 3

⇒ μ = √3(3+2)

⇒ μ = 15

⇒ μ = 3.87 BM

When n = 4

⇒ μ = √ 4(4+2)

⇒ μ = √24

⇒ μ = 4.899 BM

When n= 5

⇒ μ = √5(5+2)

⇒ μ = √35

⇒ μ = 5.92 BM

1. [K₄ [Mn(CN)₆]

⇒μ = 2.2 BM (given)

We can see from the above calculation that the given value(2.2) is close to n=1. It means that it has only one unpaired electron Also in this complex Mn is in +2 oxidati

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Example	Magnetic moment
[K₄ [Mn(CN)₆]	2.2
[Fe(H₂O)₆]^2+.	5.3
K₂ [MnCl₄]	5.9

8.48 What can be inferred from the magnetic moment values of the following complex species ? Example Magnetic moment [K4 [Mn(CN)6] 2.2 [Fe(H2O)6]2+. 5.3 K2 [MnCl4] 5.9

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