The crystal field splitting energy (CFSE) for [CoCl6]4- is about 18000 cm-1 What would be the CFSE value of [CoCl4]2- ?

Question

The crystal field splitting energy (CFSE) for [CoCl6]4- is about 18000 cm-1 What would be the CFSE value of [CoCl4]2- ? (A)  18000 cm-1  (B)  8000 cm-1  (C)  16000 cm-1  (D)  2000 cm-1

Tardigrade Admin · Accepted Answer

The crystal field energy of tetrahedral and octahedral complex are related as: Δt =(4/9) Δo Given: Δo=18000 cm-1 ∴ Δt=(4/9)×18000 cm-1 Δt=8000 cm-1

Q. The crystal field splitting energy $(CFSE)$ for $[C o C l_{6}]^{4 -}$ is about $18000 c m^{- 1}$ What would be the $CFSE$ value of $[C o C l_{4}]^{2 -}$ ?

$18000 c m^{- 1}$

$8000 c m^{- 1}$

$16000 c m^{- 1}$

$2000 c m^{- 1}$

The crystal field energy of tetrahedral and octahedral complex are related as : $Δ_{t} = \frac{4}{9} Δ_{o}$
Given : $Δ_{o} = 18000 c m^{- 1}$
$∴ Δ_{t} = \frac{4}{9} \times 18000 c m^{- 1}$
$Δ_{t} = 8000 c m^{- 1}$

Q. The crystal field splitting energy (CFSE) for [CoCl6​]4− is about 18000cm−1 What would be the CFSE value of [CoCl4​]2− ?

18000cm−1

8000cm−1

16000cm−1

2000cm−1