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Question

The zero magnetic moment of octahedral K2NiF6 is due to:

A
low spin d6 Ni(IV) complex
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B
low spin d8 Ni(II) complex
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C
high spin d8 Ni(II) complex
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D
high spin d6 Ni(IV) complex
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Solution

The correct option is A low spin d6 Ni(IV) complex
[NiF6]2x6=2
x = + 4
In +4 oxidation state, fluoride also behaves as a strong field ligand
low spin d6 Ni(IV) complex
unpaired electrons = 0 zero magnetic moment

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