Which Of The Following Ions Are Expected To Be Paramagnetic To The Same Extent? I. [FeF6]3– II. [MnCl4]2– III. [NiCl4]2–

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Question

Which of the following ions are expected to be paramagnetic to the same extent?

I. [FeF₆]^3– II. [MnCl₄]^2–

III. [NiCl₄]^2–

easy

Solution

Correct option is

I and II

[FeF₆]^3– : Fe (III) – 3d⁵ ; high spin complex (sp³d²), n = 5

[MnCl₄]^2– : Mn (II) – 3d⁵, high spin complex (sp³), n = 5

[NiCl₄]^2– : Ni (II) – 3d⁸ ; high spin complex (sp³), n = 2

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