Which one of the following complex ions is diamagnetic ?

[F e F_{6}]^{3 -}

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[C o F_{6}]^{3 -}

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[C o (C_{2} O_{4})_{3}]^{3 -}

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[F e (C N)_{6}]^{3 -}

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Solution

The correct option is C $[C o (C_{2} O_{4})_{3}]^{3 -}$
In case of $ [Co(C_2 O_4 )_3]^{3-} , $ the electrons of the cobalt are made to pair up in the presence
of oxalate ions, so the complex will be diamagnetic.
Formation of $[C o (C_{2} O_{4})_{3}]^{3 - 0}$

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Similar questions

Discuss the nature of bonding in the following coordination entities on the basis of valence bond theory:
$[F e (C N_{6})]^{4 -}$

$[F e F_{6}]^{3 -}$

$[C o (C_{2} O_{4})_{3}]^{3 -}$

$[C o F_{6}]^{3 -}$

[C o (C_{2} O_{4})_{3}]^{3 -}

{[C o F_{6}]}^{3 -}

{[C o {(C_{2} O_{4})}_{3}]}^{3 -}

{[C o {(C_{2} O_{4})}_{3}]}^{3 -}

{[C o F_{6}]}^{3 -}

t_{2 g}^{6} e_{g}^{0}

{[F e {(C N)}_{6}]}_{6}^{- 3}

{[F e {(C N)}_{6}]}_{6}^{- 4}

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