The crystal field stabilisation energy (CFSE) for is 18000 . The CFSE for will be [2019]

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Solution

Q.
The crystal field stabilisation energy (CFSE) for ${[{CoCl}_{6}]}^{4 -}$ is 18000 ${cm}^{- 1}$ . The CFSE for ${[{CoCl}_{4}]}^{2 -}$ will be [2019]

1 6000 ${cm}^{- 1}$

2 16000 ${cm}^{- 1}$

3 18000 ${cm}^{- 1}$

4 8000 ${cm}^{- 1}$

Ans.
(4)

$Δ_{t} = \frac{4}{9} Δ_{o} = \frac{4}{9} \times 18000 = 8000$ ${cm}^{- 1}$

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