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Central Atom and Ligands

Which of the ...

Question

Which of the following complex is most stable among the folowing?

A

N a_{3} [F e (C_{2} O_{4})_{3}]

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B

[C O (N H_{3})_{6}]^{+ 3}

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C

[C r (N H_{3})_{6}] C l_{3}

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D

N a_{3} [C o F_{6}]

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Solution

The correct option is A $N a_{3} [F e (C_{2} O_{4})_{3}]$
$[F e (C_{2} O_{4})_{3}]^{3 -}$ is the most stable complex because $C_{2} O_{4}$ is a strong feild ligand and forms chelation also due to its bidentatc ligand. $F e^{3 +}$ is also stable due to the fact that it has paired electrons. Hence , $N a_{3} [F e (C_{2} O_{4})_{3}]$ is most stable.

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Similar questions

Q. Among the following complexes (K-P) :

K_{3} [F e (C N_{6}] - K

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

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

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

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

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

;
the diamagnetic complexes are:

[N i (C O)_{4},, [N i C l_{4}]^{2 -}, [C o (N H_{2}), C l_{2}] C l, N a_{3} [C o F_{6}], N a_{2} O_{2} and C s O_{2} .]

the total number of paramagnetic compound is

[N i (C O)_{4}],

N i C l_{4}]^{2 -}

[C o (N H_{3})_{4} C l_{2}] C l

N a_{3} [C o F_{6}],

N a_{2} O_{2}

C s O_{2}

, the total number of paramagnetic compounds is:

Q. Find the difference in the number of electrons in

t_{2 g}

e_{g}

set of orbitals of the complex

N a_{3} [C o F_{6}]

Q. Consider the following complexes:
1)

F e (C O)_{5}

N i (C O)_{4}

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

N a_{3} [C u (S C N)_{4}]

Which of the above complex obeys

E A N

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