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What are the exceptions to Crystal Field Theory (CFT) ?

Important Questions on Coordination Compounds

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

In Wilkinson's catalyst, the hybridization of central metal ion and its shape are respectively:

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

When concentrated

HCl

is added to aqueous solution of

C o C l_{2}

, its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in reaction?

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Jahn-Teller effect is not observed in high spin complexes of

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

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

and

{[F e {(H_{2} O)}_{6}]}^{2 +}

are of different colours in dilute solutions. Why?

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Among the complexes of Ni listed below, the following is the only correct statement

I - $[Ni (CO)_{4}]$

II - ${[Ni (CN)_{4}]}^{- 2}$

III - ${[Ni ({Cl}_{4})]}^{- 2}$

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The correct increasing order for the wavelengths of absorption in the visible region for the complexes of

{Co}^{3 +}

is:

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The correct increasing order of trans-effect of the following species is

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

In aqueous solution,

{[Co {(H_{2} O)}_{6}]}^{2 +} (X)

reacts with molecular oxygen in the presence of excess

{NH}_{3}

to give a new complex

Y .

The number of unpaired electrons in

X

and

Y

are, respectively

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The complex that has highest crystal field splitting energy

(∆)

, is:

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Homoleptic octahedral complexes of a metal ion

' M^{3 +}'

with three monodentate ligands

L_{1}, L_{2} a n d L_{3}

absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is:

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Pick out the correct statement with respect to

[Mn (CN)_{6}]^{3 -} .

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The hybridisation of

Fe

K_{3} [Fe (CN)_{6}]

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The geometry and the number of unpaired electron(s) of

{[{MnBr}_{4}]}^{2 -},

respectively, are

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The spin - only magnetic moments of

{[F e {(N H_{3})}_{6}]}^{3 +} a n d {[F e F_{6}]}^{3 -}

in BM are respectively,

EASY

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The energies of

d_{xy} and d_{z}^{2}

orbitals in octahedral and tetrahedral transition metal complexes are such that

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Identify the correct trend given below:

(Atomic No. = Ti : 22, Cr : 24 and Mo : 42)

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The octahedral complex of a metal ion

M^{3 +}

with four monodentate ligands

L_{1}, L_{2}, L_{3} and L_{4}

absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

Which of the following complex ions has electrons that are symmetrically filled in both

t_{2 g}

and

e_{g}

orbitals?

HARD

Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The complex having the highest spin only magnetic moment is

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Chemistry>Inorganic Chemistry>Coordination Compounds>Crystal Field Theory

The molecule in which hybrid

MOs

involve only one d-orbital of the central atom is :

What are the exceptions to Crystal Field Theory (CFT) ?

Important Questions on Coordination Compounds

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