Match List I with List II. List I (Complex) A. [Co(NH3)5(NO2)]Cl2 B. [Co(NH3)5(SO4)]Br C. [Co(NH3)6][Cr(CN)6] D. [Co(H2O)6]Cl3 List II (Type of isomerism) I. Solvate isomerism II. Linkage isomerism III. Ionization isomerism IV. Coordination isomerism Choose the correct answer from the options given below:

The correct answer is Option 4. Full mathematical solution steps and hints are accessible in the interactive StemCET workspace.

Chemistry Q56 – NEET-UG 2024

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Home Chemistry Coordination CompoundsQuestion #334

Match List I with List II.

\begin{array}{lcl} List I (Complex) & List II (Type of isomerism) \\ A. [C o (N H_{3})_{5} (N O_{2})] C l_{2} & I. Solvate isomerism \\ B. [C o (N H_{3})_{5} (S O_{4})] B r & II. Linkage isomerism \\ C. [C o (N H_{3})_{6}] [C r (C N)_{6}] & III. Ionization isomerism \\ D. [C o (H_{2} O)_{6}] C l_{3} & IV. Coordination isomerism \end{array}

Choose the correct answer from the options given below:

Clue 1 of 3: Isomerism in Coordination Compounds

Recall the different types of structural isomerism exhibited by coordination compounds, including linkage, ionization, coordination, and solvate isomerism.

🧠 Full Solution Path

Step 1: Identify Isomerism for Complex A✦ Active

Complex A, $[C o (N H_{3})_{5} (N O_{2})] C l_{2}$ , contains the $N O_{2}^{-}$ ligand, which is an ambidentate ligand (can bind via N or O). This characteristic leads to linkage isomerism. Therefore, A matches II.

Step 2: Identify Isomerism for Complexes B and C○ Expand

Complex B, $[C o (N H_{3})_{5} (S O_{4})] B r$ , can exchange the $S O_{4}^{2 -}$ ligand inside the coordination sphere with the $B r^{-}$ counter-ion outside, forming $[C o (N H_{3})_{5} B r] S O_{4}$ . This is ionization isomerism. Therefore, B matches III. Complex C, $[C o (N H_{3})_{6}] [C r (C N)_{6}]$ , consists of two complex ions. Ligands can be exchanged between the cationic and anionic parts, e.g., $[C r (N H_{3})_{6}] [C o (C N)_{6}]$ . This is coordination isomerism. Therefore, C matches IV.

💡 Teacher's Secret Hint

Remember that ionization isomers give different ions in solution, while coordination isomers involve ligand exchange between two complex ions.

Step 3: Identify Isomerism for Complex D and Conclude○ Expand

Complex D, $[C o (H_{2} O)_{6}] C l_{3}$ , contains water molecules as ligands. It can exhibit solvate isomerism (a type of hydrate isomerism) where water molecules inside the coordination sphere are exchanged with counter-ions or water molecules outside the sphere, e.g., $[C o (H_{2} O)_{5} C l] C l_{2} \cdot H_{2} O$ . Therefore, D matches I. Combining these, the correct match is A-II, B-III, C-IV, D-I. This corresponds to option (4).

💡 Teacher's Secret Hint

Solvate isomerism is a specific type of structural isomerism where water molecules are involved in the exchange.

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Chemistry Question 56 – NEET-UG 2024

Clue 1 of 3: Isomerism in Coordination Compounds

🧠 Full Solution Path