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CFSE in Octahedral and Tetrahedral Complexes

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Question

In the complexes ${[F e {(H_{2} O)}_{6}]}^{3 +}, {[F e {(C N)}_{6}]}^{3 -}, {[F e {(C_{2} O_{4})}_{6}]}^{3 -}$ and ${[F e {(C l)}_{6}]}^{3 -}$ , more stability is shown by

A

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

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B

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

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C

{[F e {(C_{2} O_{4})}_{6}]}^{3 -}

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D

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

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Solution

The correct option is D ${[F e {(C_{2} O_{4})}_{6}]}^{3 -}$
complex having more rings in the structure will be more stable

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Similar questions

Q. In the complexes

[F e (H_{2} O)_{6}]^{3 +}, [F e (C N)_{6}]^{3 -}, [F e (C_{2} O_{4})_{3}]^{3 -}

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

most stable is:

Q. In the complex

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

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

[F e (C_{2} O_{4})_{3}]^{3 -}

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

, more stability is shown by :

Q. In the complexes

{[F e {(H_{2} O)}_{6}]}^{3 +}, {[F e {(e n)}_{3}]}^{3 +}, {[F e {(C_{2} O_{4})}_{3}]}^{3 -}

{[F e {C l}_{6}]}^{3 -}

, more stability is shown by:

Q. Out of the complexes

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

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

{[F e {(C_{2} O_{4})}_{3}]}_{3}^{3 -}

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

, the most stable one is:

Q. Find the number of complexes in which has stability greater than the stability of

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

[F e (C N)_{6}]^{3 -}, [F e (o x)_{3}]^{3 -}, [F e (N H_{3})_{6}]^{3 +}, [F e (H_{2} O)_{6}]^{3 +}, [F e (e n)_{3}]^{3 +}

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