Among the following complexes (K-M), K $_{3}$ [Fe(CN) $_{6}$ ] (K), [Co(NH $_{3}$ ) $_{6}$ ]Cl $_{3}$ (L), Na $_{3}$ [Co(oxalate) $_{3}$ ] (M) which are dimagnetic?

K, L, M

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K, M

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L, M

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K, L

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Solution

The correct option is C L, M

$K : K_{3} [F e (C N_{6})] \to F e^{3 +} \equiv 3 d^{5}$ (odd electrons)
It is paramagnetic.

L : $[C o (N H_{3})_{6}] C l_{3} \to C O^{3 +} \equiv 3 d^{6}$
$N H_{3}$ a strong field ligand and hence pairing takes place.
It is diamagnetic.

$M : N a_{3} [C o (O X)_{3}] \to C o^{3 +} \equiv 3 d^{6}$

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Similar questions

Q. Among the following complexes, the diamagnetic complexes are:

(K) : K_{3} [F e (C N)_{6}]

(L) : [C o (N H_{3})_{6}] C l_{3}

(M) : N a_{3} [C o (o x a l a t e)_{3}]

(N) : [N i (H_{2} O)_{6}] C l_{2}

(O) : K_{2} [P t (C N)_{4}]

(P) : [Z n (H_{2} O)_{6}] (N O_{3})_{2}

In the figure, if LK = 6 \sqrt{3,} find MK, ML, KN and MN and the perimeter of □ MNKL .

The straight lines $L_{1}, L_{2}, L_{3}$ are parallel and lie in the same plane. A total number of m points are taken on $L_{1}$ ,n points on $L_{2}$ , k points on $L_{3}$ .
The maximum number of triangles formed with vertices at these points are

Q. Which one of the following set of ions represents the collection of isoelectronic species?
[Atomic numbers: F = 9; Cl = 17; Na = 11; Mg = 12; Al = 13; K = 19; Ca = 20; Sc = 21]

Q. Write the IUPAC names for the following compounds:
(i) [Co(NH

_{3}

)

_{5}

ONO]Cl

_{2}

(ii) K

_{3}

[Cr(CN)

_{6}

]

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Among the following complexes (K-M), K3[Fe(CN)6] (K), [Co(NH3)6]Cl3 (L), Na3[Co(oxalate)3] (M) which are dimagnetic?

The correct option is C L, MK:K3[Fe(CN6)]→Fe3+≡3d5 (odd electrons)It is paramagnetic.L : [Co(NH3)6]Cl3→CO3+≡3d6NH3 a strong field ligand and hence pairing takes place.It is diamagnetic. M:Na3[Co(OX)3]→Co3+≡3d6

Among the following complexes (K-M), K $_{3}$ [Fe(CN) $_{6}$ ] (K), [Co(NH $_{3}$ ) $_{6}$ ]Cl $_{3}$ (L), Na $_{3}$ [Co(oxalate) $_{3}$ ] (M) which are dimagnetic?