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]2−⇒x−6=−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