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On the basis of Crystal Field theory, write the electronic configuration for the d5 ion with a strong field ligand for which Δ0 > P.
Concept: Bonding in Coordination Compounds >> Crystal Field Theory (CFT)
[Ni(CO)4] has tetrahedral geometry while [Ni(CN)4]2− has square planar, yet both exhibit diamagnetism. Explain.
[Atomic number: Ni = 28]
Concept: Bonding in Coordination Compounds >> Valence Bond Theory (VBT)
Assertion (A): EDTA is a hexadentate ligand.
Reason (R): EDTA has 2 nitrogen and 4 oxygen donor atoms.
Concept: Definitions of Some Important Terms Pertaining to Coordination Compounds
Explain [Fe(CN)6]3− is an inner orbital complex, whereas [FeF6]3− is an outer orbital complex.
[Atomic number: Fe = 26]
Concept: Bonding in Coordination Compounds >> Magnetic Properties of Coordination Compounds
Assertion (A): [Co(NH3)5SO4]Cl gives a white precipitate with silver nitrate solution.
Reason (R): The complex dissociates to give Cl− and \[\ce{SO^{2-}_4}\] ions.
Concept: Werner’s Theory of Coordination Compounds
A solution of [Ni(H2O)6]2+ is green, but a solution of [Ni(CO)4] is colourless. Explain.
[Atomic number: Ni = 28]
Concept: Bonding in Coordination Compounds >> Colour in Coordination Compounds
Write the formula for the following coordination compound.
Bis (ethane-1,2-diamine) dihydroxidochromium (III) chloride
Concept: Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds
Does ionization isomer for the following compound exist? Justify your answer.
\[\ce{Hg[Co(SCN)4]}\]
Concept: Definitions of Some Important Terms Pertaining to Coordination Compounds
Is the central metal atom in coordination complexes a Lewis acid or a Lewis base? Explain.
Concept: Definitions of Some Important Terms Pertaining to Coordination Compounds
Read the passage carefully and answer the questions that follow.
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Crystal field splitting by various ligands Metal complexes show different colours due to d-d transitions. The complex absorbs light of specific wavelength to promote the electron from t2g to eg level. The colour of the complex is due to the transmitted light, which is complementary of the colour absorbed. The wave number of light absorbed by different complexes of Cr ion are given below:
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Answer the following questions:
(a) Out of ligands "A", "B", "C" and "D", which ligand causes maximum crystal field splitting? Why?
OR
Which of the two, “A” or “D” will be a weak field ligand? Why?
(b) Which of the complexes will be violet in colour? [CrA6]3- or [CrB6]3+ and why?
(Given: If 560 - 570 nm of light is absorbed, the colour of the complex observed is violet.)
(c) If the ligands attached to Cr3+ ion in the complexes given in the table above are water, cyanide ion, chloride ion, and ammonia (not in this order).
Identify the ligand, write the formula and IUPAC name of the following:
- [CrA6]3-
- [CrC6]3+
Concept: Bonding in Coordination Compounds >> Crystal Field Theory (CFT)
Explain the following, giving two examples:
Homoleptic
Concept: Definitions of Some Important Terms Pertaining to Coordination Compounds
Explain the following, giving two examples:
Heteroleptic
Concept: Definitions of Some Important Terms Pertaining to Coordination Compounds
Give an example of chelate effect.
Concept: Types of Ligands
What is meant by didentate ligand?
Concept: Definitions of Some Important Terms Pertaining to Coordination Compounds
What happens when \[\ce{CH3 - Br}\] is treated with KCN?
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Nucleophilic Substitution
Which solution is used for the leaching of silver metal in the presence of air in the metallurgy of silver?
Concept: Oxidation Reduction
Out of C and CO, which is a better reducing agent at the lower temperature range in the blast furnace to extract iron from the oxide ore?
Concept: Occurrence of Metals
Chlorobenzene is extremely less reactive towards a nucleophilic substitution reaction. Give two reasons for the same.
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Nucleophilic Substitution
Write the structure of an isomer of compound C4H9Br which is most reactive towards SN1 reaction
Concept: Hydrocarbons: Alkanes >> Reactions of Haloalkanes - Nucleophilic Substitution Reactions
Write the final product(s) in each of the following reactions:
Concept: Hydrocarbons: Alkanes >> Reactions of Haloarenes - Nucleophilic Substitution
