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Explain [Co(NH3)6]^(3+) is an inner orbi...

Explain `[Co(NH_3)_6]^(3+)` is an inner orbital complex whereas `[Ni(NH_3))6]^(2+)` is an outer orbital complex.

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In `[Co(NH_3)_6]^(3+)`, Co is in +3 state with the ground configuration : `3d^6`. In the presence of strong ligand `NH_3`, 3d electrons pair up leaving two dorbitals empty. Hence, the hybridisation is `d^2sp^3` forming an inner orbital complex. In `[Ni(NH_3)_6]^(2+)`, Ni is in +2 state with the ground state outer electronic configuration : `3d^8`. Even in the presence of strong ligand `NH_3`, the 3d-electrons do not pair up because pairing up of electrons in four 3d orbitals cannot make available 2 empty d-orbitals needed for `d^2sp^3` -hybridisation. The hybridisation involved is therefore `sp^3d^2` forming an outer orbital complex.
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BETTER CHOICE PUBLICATION-CO-ORDINATION COMPOUNDS-QUESTION FROM PREVIOUS BOARD EXAMINATION
  1. Explain [Co(NH3)6]^(3+) is an inner orbital complex whereas [Ni(NH3))6...

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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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