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With the help of crystal field theory, predict the number of unpaired electrons in `[Fe(CN)_6]^(4-)` and `[Fe(H_2O)_6]^(2+)`.

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`[Fe(CN)_6]^(4-)`
O.S. of Fe = + 2`" "`E.C. of `Fe^(2+)` : `3d^6`
After pairing no. of unpaired electrons = 0
`[Fe(H_2O)_6]^(2+)`
O.S. of Fe = +2`" "`E.C. of `Fe^(2+)` : `3d^6`
No pairing hence no. of unpaired electrons = 4
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BETTER CHOICE PUBLICATION-CO-ORDINATION COMPOUNDS-QUESTION FROM PREVIOUS BOARD EXAMINATION
  1. Discuss structure of [Co(NH3)6]^(3+) ion the basis of V.B.T.

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  2. What is the state of hybridisation and geometry in [Ni(CN)4]^(-2)

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  3. What is the state of hybridisation and geometry in [Ni(CN)4]^(-2)

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  4. Explain [Fe(H2O)6]^(3+) is paramagnetic.

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  5. With the help of crystal field theory, predict the number of unpaired ...

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  6. predict the number of unpaired electrons in [CoF6]^(3-) and [Co(NH3)6]...

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  7. With the help of the crystal field theory predict the number of unpair...

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  8. Account for the different magnetic behaviour of hexacyanoferrate (III)...

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  9. Explain : [Co(CN)6]^(3-) is diamagnetic while [CoF6]^(3-) is paramagne...

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  10. Draw the geometrical isomers of [Co(en)2CI2]^+ ion.Which of these is o...

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  11. Draw the geometrical isomers of [Co(en)2CI2]^+ ion.Which of these is o...

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  12. Discuss the main postulates of valence bond theory.

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  13. Write the name of ionisation isomer of the compound [Co(NH3)5 Br]SO4.

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  14. Draw the geometrical isomers of [Co(en)2CI2]^+ ion.Which of these is o...

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  15. Write the name of ionisation isomer of the compound [CO(NH3)4 Cl2]NO2

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  16. Draw the geometrical isomers of [Pt(NH3)2.CI2]. Which of these is opti...

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  17. Draw the geometrical isomers of [Pt(NH3)2.CI2]. Which of these is opti...

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  18. Explain the difference between a weak field ligand and a strong field ...

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  19. Write the structure and hybridisation of the central atom in [CoCl2 (N...

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  20. [Ti (H2O)6]^(3+) is coloured while [Sc(H2O)6]^(3+) is colourless. Expl...

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