9.8 Explain [Co(NH3 )6 ] 3+ is an inner orbital complex whereas [Ni(NH3 )6 ] 2+ is an outer orbital complex.

[Co (NH3)6]3+ [Ni (NH3)6]2+ Oxidation state of cobalt: Overall charge balance: X + 6 (0) = 3 X = + 3 Oxidation state of nickel: Overall charge balance: X + 6 (0) = 2 X = + 2 Outer electronic configuration of cobalt = d6 Outer electronic configuration of nickel = d8 NH3 is a strong field ligand so it causes pairing of electron. Therefore cobalt undergoes d2sp3 hybridisation. As in the hybridisation d2 orbitals are used from the (n-1)d orbitals (inner orbitals as n = 4 being quantum number) . hence it is a inner orbital complex. NH3 is a strong field ligand so it causes pairing of electron. Therefore, nickel undergoes sp3 d2 hybridisation. As in the hybridisation, d2 orbitals are used from the and orbitals (outer orbitals as n = 4 being quantum number). Hence, it is an outer orbital complex

9.8 Explain [Co(NH₃ )₆ ] ³⁺ is an inner orbital complex whereas [Ni(NH₃ )₆ ] ²⁺ is an outer orbital complex.

131 Views|Posted 10 months ago

Asked by Shiksha User

1 Answer

Sort by:

Answered by

Vishal Baghel | Contributor-Level 10

10 months ago

[Co (NH₃)₆]³⁺

[Ni (NH₃)₆]²⁺

Oxidation state of cobalt:

Overall charge balance:

X + 6 (0) = 3

X = + 3

Oxidation state of nickel:

Overall charge balance:

X + 6 (0) = 2

X = + 2

Outer electronic configuration of cobalt = d⁶

Outer electronic configuration of nickel = d⁸

NH₃ is a strong field ligand so it causes pairing of electron. Therefore cobalt undergoes

d²sp³ hybridisation. As in the hybridisation d² orbitals are used from the (n-1)d orbitals (inner orbitals as n = 4 being quantum number) . hence it is a inner orbital complex.

NH₃ is a strong field ligand so it causes pairing of electron. Therefore, nickel undergoes sp³ d² hybridisation. As in the hybridisation, d² orbitals are used from the and orbitals (outer orbitals as n = 4 being quantum number). Hence, it is an outer orbital complex