ANSWERS

 

Here are the answers to the fill-in-the-blanks for the chapter "Coordination Compounds":

Topic	Answers
1. Coordination Entity	A coordination entity consists of a central metal atom/ion bonded to a fixed number of ligands.
2. Ligands	Ligands are neutral or charged species that donate a pair of electrons to the central atom in a coordination compound.
3. Coordination Number	The coordination number of a central atom is the number of ligands attached to it.
4. Types of Ligands	Ligands can be classified based on the number of donor atoms as monodentate, bidentate, and polydentate ligands.
5. Monodentate Ligands	Ligands like Cl⁻ and NH₃ that have only one donor atom are called monodentate ligands.
6. Bidentate Ligands	Ligands like ethylenediamine (en), which have two donor atoms, are called bidentate ligands.
7. Chelation	The process by which a polydentate ligand forms a ring structure with the central atom is called chelation.
8. Coordination Number of [Co(NH₃)₆]³⁺	The coordination number of cobalt in the complex [Co(NH₃)₆]³⁺ is 6.
9. Oxidation State of Central Metal	The oxidation state of the central metal in [Fe(CN)₆]³⁻ is +3.
10. Werner’s Theory	According to Werner’s theory, a coordination compound has a primary valency, also called coordination number, and a secondary valency or charge.
11. Isomerism in Coordination Compounds	Coordination compounds exhibit geometrical, optical, and linkage isomerism.
12. Geometrical Isomerism	Geometrical isomerism occurs in square planar and octahedral complexes.
13. Crystal Field Theory	According to Crystal Field Theory, the ligand field splits the degenerate d-orbitals of the central metal ion into eg and t₂g sets.
14. Splitting in Octahedral Field	In an octahedral crystal field, the d-orbitals split into t₂g and eg orbitals.
15. Color of Coordination Compounds	The color of coordination compounds is due to d-d transitions between the split d orbitals of the central metal ion.
16. Naming Complexes	In naming complexes, the ligands are named in alphabetical order, followed by the name of the central metal and its oxidation state in parentheses.
17. Example of a Chelate	An example of a chelate is [Ni(en)₃]²⁺.
18. Ambidentate Ligand Example	An example of an ambidentate ligand is NO₂⁻, which can coordinate through either the N or the O atom.

These answers provide a clear understanding of the important concepts of coordination compounds.