Chemistry Class 12 NCERT Solutions: Chapter 9 Coordination Compounds Part 3

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Q: 6. Using IUPAC norms write the formulas for the following:

(i) Tetrahydroxozincate (II)

(ii) Potassium tetrachloropalladate (II)

(iii) Diamminedichloridoplatinum (II)

(iv) Potassium tetracyanonickelate (II)

(v) Pentaamminenitrito-O-cobalt (III)

(vii) Potassium tri (oxalate) chromate (III)

(viii) Hexaammineplatinum (IV)

(ix) Tetrabromidocuprate (II)

(x) Pentaamminenitrito-N-cobalt (III)

Answer:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)

(viii)

(ix)

(x)

Q: 7. Using IUPAC norms write the systematic names of the following:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(Vii)

(viii)

(ix)

Answer:

(i) Hexaamminecobalt (III) chloride

(ii) Diamminechlorido (mrthylamine) platinum (II) chloride

(iii) Hexaquatitanium (III) ion

(iv) Tetraamminichloridonitrito-N-Cobalt (III) chloride

(v) Hexaaquamanganese (II) ion

(iv) Tetrachloronickelate (II) ion

(vii) Hexaamminenickel (II) chloride

(viii) Tris (ethane-1, 2-diammine) cobalt (III) ion

(ix) Tetracarbonylnickel (0)

Q: 8. List various types of isomerism possible for coordination compounds, giving an example of each.

Answer:

Q 8 List Of Various Types Of Isomerism

Q 8 List of Various Types of Isomerism

Q 8 List Of Various Types Of Isomerism

(A) Geometric isomerism:

This type of isomerism is common in heteroleptic complexes. It arises due to the different possible geometric arrangements of the ligands. For example:

Q 8 (A) Geometric Isomerism

Q 8 (A) Geometric Isomerism

Q 8 (A) Geometric Isomerism

(B) Optical Isomerism:

This type of isomerism arises in chiral molecules. Isomers are mirror images of each other and are non-superimposable.

Q 8 (B) Optical Isomerium

Q 8 (B) Optical Isomerium

Q 8 (B) Optical Isomerium

(C) Linkage Isomerism:

This type of isomerism is found in complexes that contain ambidentate ligands. For example:

Yellow form Red form

(D) Coordination Isomerism:

This type of isomerism arises when the ligands are interchanged between cationic and anionic entities of different metal ions present in the complex.

(E) Ionization Isomerism:

This type of isomerism arises when a counter ion replaces a ligand within the coordination sphere. Thus, complexes that have the same composition, but furnish different ions when dissolved in water are called ionization isomers. For e.g., .

(f) Solvate isomerism:

Solvate isomers differ by whether or not the solvent molecule is directly bonded to the metal ion or merely present as a free solvent molecule in the crystal lattice.

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