Calculate CFSE of the following complexes :
$[C o F_{6}]^{3 -}$

- 0.4 Δ_{0}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

0.4 Δ_{0}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

- 0.4 Δ_{t}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

0.6 Δ_{t}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $- 0.4 Δ_{0}$
Option (B) is correct.
In $[C o F_{6}]^{3 -}$ , cobalt has $3 d^{7}, 4 s^{2}$ system in ground state but in excited state it loses three electrons in the formation of ions and two elctrons from $4 s$ and one from $3 d$ orbital so thus Cobalt gets $3 d^{6}$ configuration. Now it is of high spin so 4 electrons go to $t_{2 g}$ orbital and 2 electrons go to $e_{g}$ orbital. By applying formula,

$Δ$ = no. of electrons in $t_{2 g}$ ⋅(−0.4)+ no. of electrons in $e_{g}$ (0.6)
= 4(−0.4)+2(0.6)
=−1.6+1.2
= −0.4 $Δ_{0}$

Suggest Corrections

Similar questions

Q. Calculate CFSE of the following complexes :

[F e (C N)_{6}]^{4 -}

Q. Calculate CFSE of the following complex:

[C u (N H_{3})_{6}]^{2 +}

Q. The crystal field splitting energy CFSE

(I n Δ_{0} u n i t s)

for

[C o F_{6}]^{3 -}

will be:

Consider the following statements

$S_{1}$ : Generally square planar complexes show geometrical isomerism but do not exhibit optical isomerism because they do not possess plane of symmetry

$S_{2} : Δ_{t} = \frac{4}{9} Δ_{o}$

$S_{3}$ : In octahedral complexes each electron entering the $t_{2 g}$ orbtials stabilizes the complex ion by $0.4 Δ_{o}$ and each electron entering the $e_{g}$ orbital destabilizes the complex by an amount of $0.6 Δ_{o}$

Q. Consider the following two complex ions :

{[C o F_{6}]}^{3 -}

and

{[C o {(C_{2} O_{4})}_{3}]}^{3 -}

. Which of the following statement(s) is/are false?
I. Both are octahedral.
II.

{[C o {(C_{2} O_{4})}_{3}]}^{3 -}

is diamagnetic while

{[C o F_{6}]}^{3 -}

is paramagnetic.
III. Both are outer orbital complexes.
IV. In both the complexes, the central metal is in the same oxidation state.

Join BYJU'S Learning Program

Calculate CFSE of the following complexes :[CoF6]3−

Calculate CFSE of the following complexes :
$[C o F_{6}]^{3 -}$