Question 1

Which of the following ligands have two potential atoms of attachment (donor atoms)?

Accepted Answer

(CH₃)₂NCH₂CH₂NH₂ is a bidentate ligand with two nitrogen atoms as donor atoms.

Question 2

Find the correct name for the complex [Fe(CN)₅(H₂O)]^2-:

Accepted Answer

The complex is an anion, so it has a negative charge. The iron ion is in the +3 oxidation state, so the complex is [Fe(CN)₅(H₂O)]^2-. The name of the complex is aquapentacyanidoferrate(III).

Question 3

Suggest the most likely geometry for (i) [FeCl₄]^2- and (ii) [PdCl₄]^2-.

Accepted Answer

For (i) [FeCl4]2-, iron (Fe) is in a +2 oxidation state, leading to a d^6 configuration which typically forms tetrahedral complexes due to the high spin configuration. For (ii) [PdCl4]2-, palladium (Pd) is in a +2 oxidation state, leading to a d^8 configuration which typically forms square planar complexes, especially for Pd(II) due to its preference for this geometry.

Question 4

For which elements would you expect to find coordination numbers above eight?

Accepted Answer

The answer of For which elements would you expect to...

Question 5

Which class of ligands can give linkage isomers?

Accepted Answer

Ambidentate ligands can bind to the central metal atom/ion through two different atoms, allowing for the possibility of linkage isomers.

Question 6

How many isomers are possible for a tetrahedral complex [Ma₂bc]?

Accepted Answer

The answer of How many isomers are possible for a...

Question 7

For which of the following cases of octahedral complexes should we consider the possibility of optical isomers?

Accepted Answer

A complex with three chelating ligands can exhibit optical isomerism because the arrangement of the ligands can lead to non-superimposable mirror images, which is a requirement for optical activity.

Question 8

Amino acids are important chelating ligands that bind to the metal through N and O atoms. Suppose you prepared a square planar platinum complex using D amino acid [Pt(D-AA)₂]. Do you expect a chiral complex?

Accepted Answer

The amino acid is chiral, and the square planar complex can have two different arrangements of the amino acids, resulting in a chiral complex.

Question 9

Which of the following statements is(are) correct? (i) K_f is a measure of the interaction strength of a ligand relative to the interaction strength of the solvent molecules as a ligand. (ii) The general trend in successive formation constants is K₁ < K₂ < K₃ < …. < K_n. (iii) The dissociation constant is inverse of the formation constant.

Accepted Answer

(i) Correct. The notation K_f represents a stepwise formation constant for a ligand binding to a metal ion, comparing the strength of interaction of the ligand to that of solvent molecules, indicating the relative binding affinity.(iii) Correct. The dissociation constant (Kd) is indeed the inverse of the formation constant (Kf), reflecting the equilibrium between the associated and dissociated states of a complex.

Question 10

Find the correct statement:

Accepted Answer

The chelate effect refers to the enhanced affinity of chelating ligands for a metal ion compared to the affinity of a collection of similar non-chelating (monodentate) ligands for the same metal. The chelate effect is largely entropic because it involves the displacement of more than one ligand by one chelating ligand, leading to an increase in disorder.

Quiz 7: An Introduction to Coordination Compounds

Which of the following ligands have two potential atoms of attachment (donor atoms) ?

Find the correct name for the complex [Fe(CN) ₅(H₂O) ]^2-:

Suggest the most likely geometry for (i) [FeCl₄]^2- and (ii) [PdCl₄]^2-.

For which elements would you expect to find coordination numbers above eight?

Which class of ligands can give linkage isomers?

How many isomers are possible for a tetrahedral complex [Ma₂bc]?

For which of the following cases of octahedral complexes should we consider the possibility of optical isomers?

Amino acids are important chelating ligands that bind to the metal through N and O atoms. Suppose you prepared a square planar platinum complex using D amino acid [Pt(D-AA) ₂]. Do you expect a chiral complex?

Find the correct statement:

Quiz 7: An Introduction to Coordination Compounds

Which of the following ligands have two potential atoms of attachment (donor atoms) ?

Find the correct name for the complex [Fe(CN) 5(H2O) ]2-:

Suggest the most likely geometry for (i) [FeCl4]2- and (ii) [PdCl4]2-.

For which elements would you expect to find coordination numbers above eight?

Which class of ligands can give linkage isomers?

How many isomers are possible for a tetrahedral complex [Ma2bc]?

For which of the following cases of octahedral complexes should we consider the possibility of optical isomers?

Amino acids are important chelating ligands that bind to the metal through N and O atoms. Suppose you prepared a square planar platinum complex using D amino acid [Pt(D-AA) 2]. Do you expect a chiral complex?

Find the correct statement:

Find the correct name for the complex [Fe(CN) ₅(H₂O) ]^2-:

Suggest the most likely geometry for (i) [FeCl₄]^2- and (ii) [PdCl₄]^2-.

How many isomers are possible for a tetrahedral complex [Ma₂bc]?

Amino acids are important chelating ligands that bind to the metal through N and O atoms. Suppose you prepared a square planar platinum complex using D amino acid [Pt(D-AA) ₂]. Do you expect a chiral complex?