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[Fe(CN)6)]^(4-) and [Fe(H2O)6)]^(2+) ...

`[Fe(CN)_6)]^(4-)` and `[Fe(H_2O)_6)]^(2+)` are of different colours in dilute solutions. Why ?

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In both the complexes, Fe is +2. state with the configuration `3d^6` having four unpaired electrons. As the ligands `H_2O` and `CN^(-)` possess different crystal field splitting energy `(Delta_(o))`, they absorb different components of the visible light for d-d transition. Hence, the transmitted colours are different.
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BETTER CHOICE PUBLICATION-CO-ORDINATION COMPOUNDS-QUESTION FROM PREVIOUS BOARD EXAMINATION
  1. [Fe(CN)6)]^(4-) and [Fe(H2O)6)]^(2+) are of different colours in di...

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  2. Write the IUPAC name of corordination compound [Co(NH3)3ONO]Cl2.

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  3. How many isomers are possible for the netural complex [Co(NH3)3Cl3]? D...

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  4. Discuss the nature of bonding in the following coordination entities o...

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  5. Write the IUPAC name for the corordination compound. [Zn(NH3)4]2+

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  6. Explain: [Ni (CN)4]^(2-) is diamagnetic while [Ni(Cl)4]^(2-) is parama...

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  7. Write IUPAC name of the following K2[Zn(OH)4]

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  8. Write IUPAC name of the following K3[Al(C2O4)]3

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  9. Write IUPAC name of the following K2[Cu(CN4)]

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  10. Write IUPAC name of the following [Co(NH3)3Cl]Cl2

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  11. Write IUPAC name of the following [Co(en)2Br2Cl

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  12. Write IUPAC name of the following [Co(NH3)5Br]Cl2

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  13. Write IUPAC name of the following K3[Fe(C2O4)3]

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  14. Write IUPAC name of the following Na[Au(CN)2]

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  15. Write IUPAC name of the following K2[Fe(CN)6]

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  16. Write IUPAC name of the following K2[Fe(CN)6]

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  17. Write the IUPAC name of the following : K3[Fe (CN)5 NO]

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  18. Write IUPAC name of the following K3[Cr(C2O4)3]

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  19. Write IUPAC name of the following K3[Cr(C2O4)3]

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  20. Write IUPAC name of the following K[PtCl3(NH3)]

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  21. Write IUPAC name of the following K2[Fe(CN)6]

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