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ChemistryNEET 2024Isomerism in coordination compounds

Coordination Compounds

Match List I with List II.

List I (Complex) List II (Type of isomerism)
A. [Co(NH3)5(NO2)]Cl2\mathrm{[Co(NH_3)_5(NO_2)]Cl_2} I. Solvate isomerism
B. [Co(NH3)5(SO4)]Br\mathrm{[Co(NH_3)_5(SO_4)]Br} II. Linkage isomerism
C. [Co(NH3)6][Cr(CN)6]\mathrm{[Co(NH_3)_6][Cr(CN)_6]} III. Ionisation isomerism
D. [Co(H2O)6]Cl3\mathrm{[Co(H_2O)_6]Cl_3} IV. Coordination isomerism

Choose the correct answer from the options given below:

  1. A.A-I, B-III, C-IV, D-II
  2. B.A-I, B-IV, C-III, D-II
  3. C.A-II, B-IV, C-III, D-I
  4. D.A-II, B-III, C-IV, D-I✓

Solution

NO2−\mathrm{NO_2^-} can bind through N or O — linkage isomerism (A-II). Exchanging SO42−\mathrm{SO_4^{2-}} and Br−\mathrm{Br^-} between coordination sphere and counter-ion — ionisation isomerism (B-III). Two complex ions can swap ligands — coordination isomerism (C-IV). Water inside versus outside the sphere — solvate/hydrate isomerism (D-I).

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