coordination compound 3

Question 1

Sterioisomers

Answer 1

Stereoisomers have the same chemical formula and chemical
bonds but they have different spatial arrangement

Question 2

geometric isomers

Answer 2

This type of isomerism arises in heteroleptic
complexes due to different possible geometric
arrangements of the ligands.

Question 3

enantiomers.

Answer 3

Optical isomers are mirror images that
cannot be superimposed on one
another. These are called as
enantiomers.

Question 4

Linkage isomerism

Answer 4

Linkage isomerism arises in a coordination compound containing
ambidentate ligand.

Question 5

Coordination
Isomerism

Answer 5

This type of isomerism arises from the interchange of ligands between
cationic and anionic entities of different metal ions present in a complex.

Question 6

Ionisation
Isomerism

Answer 6

This form of isomerism arises when the counter ion in a complex salt
is itself a potential ligand and can displace a ligand which can then
become the counter ion.

Question 7

Solvate
Isomerism

Answer 7

This form of isomerism is known as ‘hydrate isomerism’ in case where
water is involved as a solvent.

Question 8

Valence
Bond
Theory

Answer 8

According to this theory, the metal atom or ion under the influence of
ligands can use its (n-1)d, ns, np or ns, np, nd orbitals for hybridisation
to yield a set of equivalent orbitals of definite geometry such as octahedral,
tetrahedral, square planar

Question 9

The magnetic moment of coordination compounds

Answer 9

The magnetic moment of coordination compounds can be measured
by the magnetic susceptibility experiments.

Question 10

The spin only magnetic moment of [MnBr4
]2– is 5.9 BM. Predict the
geometry of the complex ion ?

Answer 10

Since the coordination number of Mn2+ ion in the complex ion is 4, it
will be either tetrahedral (sp3 hybridisation) or square planar (dsp2
hybridisation). But the fact that the magnetic moment of the complex
ion is 5.9 BM, it should be tetrahedral in shape rather than square
planar because of the presence of five unpaired electrons in the d orbitals.

Question 11

Limitations
of Valence
Bond
Theory

Answer 11

(i) It involves a number of assumptions.
(ii) It does not give quantitative interpretation of magnetic data.
(iii) It does not explain the colour exhibited by coordination compounds.
(iv) It does not give a quantitative interpretation of the thermodynamic
or kinetic stabilities of coordination compounds.
(v) It does not make exact predictions regarding the tetrahedral and
square planar structures of 4-coordinate complexes.
(vi) It does not distinguish between weak and strong ligands.