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

Exercise: 2

Write the formulas for the following coordination compounds:

(i) Tetraamminediaquacobalt (III) chloride

(ii) Potassium tetracyanonickelate (II)

(iii) Tris (ethane βˆ’ 1,2 βˆ’ diamine) chromium (III) chloride

(iv) Amminebromidochloridonitrito-N-palatinate (II)

(v) Dichloridobis (ethane βˆ’ 1,2 βˆ’ diamine) platinum (IV) nitrate

(vi) Iron (III) hexacyanoferrate (II)

Answer:

(i)

(ii)

(iii)

(vi)

(v)

(vi)

Q: 2. Write the IUPAC names of the following coordination compounds:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

Answer:

(i) Hexaamminecobalt (III) chloride

(ii) Pentaamminechloridocobalt (III) chloride

(iii) Potassium hexacyanoferrate (III)

(iv) Potassium trioxalatoferrate (III)

(v) Potassium tetrachloropalladate (II)

(vi) Diamminechloride (methylamine) platinum (II) chloride

Q: 3. Indicate the types of isomerism exhibited by the following complexes and draw the structures for these isomers:

I.

II.

III.

IV.

Answer:

I. Both geometrical (cis-, trans) isomers for can exist. Also, optical isomers for cis-isomer exist.

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

Trans-isomer is optically inactive. On the other hand, cis-isomer is optically active.

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

(ii) Two optical isomers for exist.

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

Two optical isomers are possible for this structure.

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

(iii)

A pair of optical isomers:

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

It can also show linkage isomerism.

and

It can also show ionization isomerism.

(iv) Geometrical (cis-trans-) isomers of can exist.

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