[Co(NH3)6]3+ and [CoF6]3- are respectively known as :
- Inner orbital Complex, Spin paired Complex
- Spin paired Complex, Spin free Complex
- Spin free Complex, Spin paired Complex
- Outer orbital Complex, Inner orbital Complex
Answer
(2) Spin paired Complex, Spin free Complex
Solution
[figure]
∵ NH3 (strong field, o > P) pairs all six electrons in t2g ⇒ spin paired (inner orbital, d2sp3)
∵ F- (weak field, o < P) gives no pairing ⇒ 4 unpaired e⁻ ⇒ spin free (outer orbital, sp3d2)
Answer: (2)