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Standard XII

Chemistry

CFSE in Octahedral and Tetrahedral Complexes

Give the elec...

Question

Give the electronic configuration of the following on the basis of crystal field splitting theory.
${[C o F_{6}]}^{3 -}$ and ${[C u {({N H}_{3})}_{6}]}^{2 +}$

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Solution

$[C O F_{6}]^{3 -} \to d^{6} \to t 2 g^{4} e g^{2}$ no pairing
$[C u (N H_{3})_{6}]^{2 +} \to C u^{2 +} \to d^{9} \to t 2^{6} g e g^{3}$ (not possible pairing)
Since $F^{-}$ is weak field ligand .it do not causes pairing of $e^{-}$

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Similar questions

Give the electronic configuration of the following complexes on the basis of crystal field splitting theory. $[C o F_{6}]^{3 -}, [F e (C N)_{6}]^{4 -}$ and $[C u (N H_{3})_{6}]^{2 +} .$

Q. Electronic configuration of

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

on the basis of crystal field splitting theory is :

Q. What is meant by crystal field splitting energy ? On the basis of crystal field theory, write the electronic configuration of

d^{4}

in terms of

t_{2 g}

and

e_{g}

in an octahedral field when
(i)

Δ_{0} > P

(ii)

Δ_{0} < P

Q. (i) What type of isomerism is shown by the complex

[C r (H_{2} O)_{6}] C l_{3}

?
(ii) On the basis of crystal field theory, write the electronic configuration for

4 d

ion if

Δ_{0} > P

.
(iii) Write the hybridization and shape of

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

(Atomic number of Co=27).

Q. I)

[M n C l_{6}]^{3 -}, [F e F_{6}]^{3 -}

and

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

are paramagnetic having four, five and four unpaired electrons respectively.
II) Valence bond theory gives a quantitative interpretation of the thermodynamic stabilities of coordination compounds.
III) The crystal field splitting

Δ_{0}

, depends upon the field produced by the ligand and charge on the metal ion.
Amongst the following correct statements are :

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Give the electronic configuration of the following on the basis of crystal field splitting theory.[CoF6]3− and [Cu(NH3)6]2+

[COF6]3−→d6→t2g4eg2 no pairing[Cu(NH3)6]2+→Cu2+→d9→t26geg3 (not possible pairing)Since F− is weak field ligand .it do not causes pairing of e−

Give the electronic configuration of the following on the basis of crystal field splitting theory.
${[C o F_{6}]}^{3 -}$ and ${[C u {({N H}_{3})}_{6}]}^{2 +}$

$[C O F_{6}]^{3 -} \to d^{6} \to t 2 g^{4} e g^{2}$ no pairing
$[C u (N H_{3})_{6}]^{2 +} \to C u^{2 +} \to d^{9} \to t 2^{6} g e g^{3}$ (not possible pairing)
Since $F^{-}$ is weak field ligand .it do not causes pairing of $e^{-}$