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Q. 17

Which of the following options are correct for [Fe(CN)₆]^3– complex?
A. d²sp³hybridisation

B. sp³d²hybridisation

C. paramagnetic

D. diamagnetic

Class 12th Chemistry - Exemplar 9. Coordination Compounds

Answer :

Fe³⁺

[Ar]

Number of unpaired electrons =1

So, [Fe(CN)₆]^3– is paramagnetic.

Thus,

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RELATED QUESTIONS :

Using valence bond theory, explain the following in relation to the complexes given below:

[Mn(CN)₆]^3– , [Co(NH₃)₆]³⁺, [Cr(H₂O)₆]³⁺ , [FeCl₆]^4–

(i) Type of hybridisation.

(ii) Inner or outer orbital complex.

(iii) Magnetic behaviour.

(iv Spin only magnetic moment value.

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Why are different colours observed in octahedral and tetrahedral complexesfor the same metal and same ligands?

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What is the relationship between the observed colour of the complex and thewavelength of light absorbed by the complex?

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Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: [Fe(CN)₆]^3– ion shows magnetic moment corresponding to twounpaired electrons.

Reason: Because it has d²sp³ type hybridisation.

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Using crystal field theory, draw energy level diagram, write the electronic configuration of the central metal atom/ion and determine the magnetic moment value in the following:

(i) [CoF₆]^3–, [Co(H₂O)₆]²⁺ , [Co(CN)₆]^3–

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