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Chemistry Class 12 NCERT Solutions: Chapter 9 Coordination Compounds Part 3
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:
(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:
(B) Optical Isomerism:
This type of isomerism arises in chiral molecules. Isomers are mirror images of each other and are non-superimposable.
(C) Linkage Isomerism:
This type of isomerism is found in complexes that contain ambidentate ligands. For example:
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(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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