Coordination Complexes and Absorption Spectra

Play an AI-generated podcast conversation about this lesson

Which type of ligands can cause asymmetrical negative field in a complex?

Anions (correct)

Neutral molecules

Metal atoms

Cations

What effect does the repulsion between metal d orbitals and ligands have in an octahedral coordination entity?

Raises energy of d x^2-y^2 and d z^2 orbitals (correct)

Removes degeneracy of the d orbitals

Increases degeneracy of the t2g set

Lowers energy of dxy, dyz, and dxz orbitals

What is the reason for the splitting of d orbitals in a complex?

Absence of negative charges

Presence of neutral molecules

Attraction between ligands and metal d orbitals

Repulsion between ligands and metal d orbitals (correct)

Which set of orbitals experiences more repulsion and is raised in energy in an octahedral complex?

d x^2-y^2 and d z^2 Signup and view all the answers

What does the removal of degeneracy of the d orbitals result in?

Three orbitals of lower energy (t2g set) and two orbitals of higher energy (eg set) Signup and view all the answers

Which crystal field causes the lifting of degeneracy of d orbitals due to its nature?

Octahedral crystal field Signup and view all the answers

What is the coordination number of the complex [Cr(en)3]Cl3?

6 Signup and view all the answers

Which complex exhibits ionisation isomerism?

[Co(NH3)5Br]SO4 Signup and view all the answers

Why does NiCl4 have a +2 oxidation state while Ni(CO)4 has a zero oxidation state?

Presence of CO ligand pairs up d electrons in Ni(CO)4. Signup and view all the answers

How many optical isomers can exist for [Pt(NH3)BrCl(NO2)]?

2 Signup and view all the answers

Which ligand leads to the hybridization of d2sp3 in a coordination complex?

CN Signup and view all the answers

What type of isomers are possible for the complex Fe4[Fe(CN)6]3?

Ionisation and linkage isomers Signup and view all the answers

What term did Werner propose for the number of groups bound directly to the metal ion?

Secondary valence Signup and view all the answers

Which complex corresponds to the color yellow in the formulation of cobalt(III) chloride-ammonia complexes?

[Co(NH3)6]Cl3 Signup and view all the answers

What is the common empirical formula for the last two compounds in Table 5.1?

CoCl3.4NH3 Signup and view all the answers

What does a 1:2 electrolyte signify in the context of cobalt(III) chloride-ammonia complexes?

One mole of cobalt with two moles of ammonia Signup and view all the answers

According to Werner's theory, what satisfies the primary valences in coordination compounds?

Negative ions Signup and view all the answers

How many types of linkages did Werner propose metals to show in coordination compounds?

Two Signup and view all the answers

Why does the complex [Ti(H2O)6]3+ appear violet in color?

Due to absorption of light corresponding to the energy of the blue-green region. Signup and view all the answers

Why is [Ti(H2O)6]Cl3 colorless when heated to remove water?

Due to the absence of ligands causing crystal field splitting. Signup and view all the answers

Which coordination entity absorbs light in the ultraviolet region?

[CoCl(NH3)5]2+ Signup and view all the answers

What is the color observed for [Co(CN)6]3– coordination entity?

Orange Signup and view all the answers

What electronic configuration does titanium ([Ti]) have in the complex [Ti(H2O)6]3+?

[Ar] 4s^2 3d^1 Signup and view all the answers

What causes the color of coordination compounds according to crystal field theory?

d-d transition of electrons. Signup and view all the answers

Which compound is used for the hydrogenation of alkenes?

[(Ph3P)3RhCl] Signup and view all the answers

In black and white photography, which complex ion is formed by dissolving undecomposed AgBr?

[Ag(S2O3)2] Signup and view all the answers

Coordination Complexes and Absorption Spectra

Podcast Beta

Questions and Answers