$C o^{2 +} (a q .) + S C N^{-} (a q .) \to C o m p l e x (X)$
$N i^{2 +} (a q .) + d i m e t h y l g l y o x i m e N H_{4} O H - ---- \to C o m p l e x (Y)$
The coordination number of cobalt and nickel in both the complexes (X) and (Y) is four. Select the correct statement for the complexes (X) and (Y).

(X) is paramagnetic with two unpaired electrons.

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(Y) is diamagnetic and shows intermolecular H-bonding.

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(X) is paramagnetic with three unpaired electrons and (Y) is diamagnetic.

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(X) and (Y) both are diamagnetic.

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Solution

The correct option is D (X) is paramagnetic with three unpaired electrons and (Y) is diamagnetic.
The complexes X and Y are $[C o (S C N)_{4}]^{2 -}$ and $[N i (d m g)_{2}]$ . The central metal ions in these complexes undergo $s p^{3}$ and $d s p^{2}$ hybridization respectively. They contain 3 and 0 unpaired electrons respectively. hence they are paramagnetic and diamagentic respectively.

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Similar questions

C o^{2 +} (a q .) + S C N^{-} (a q .) \to C o m p l e x (X)

N i^{2 +} (a q .) + d i m e t h y l g l y o x i m e N H_{4} O H - ---- \to C o m p l e x (Y)

C o^{2 +} (a q .) + S C N^{-} (a q) \to

(X)

N i^{2 +} (a q) +

N H_{4} O H - ---- \to

(Y)

[C u (N O_{2})_{6}]^{4 -}

[F e (H_{2} O)_{6}]^{3 +}

[F e C l_{6}]^{3 -}

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

[F e C l_{6}]^{3 -}

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