MHT CET202519 Apr 2025Evening ShiftChemistryCoordination CompoundsActual
Identify pair of complexes that exhibits solvate isomerism.
Options
- A[ Cr ( H ₂ O )₆ ] Cl ₃ and [ Cr ( H ₂ O )₅ Cl ] Cl ₂ H ₂ O
- B[ CO ( NH ₃ )₅ SO ₄ ] Br and [ CO ( NH ₃ )₅ Br ] SO ₄
- C[ CO ( NH ₃ )₆ ] [ Cr ( CN )₆ ] and [ Cr ( NH ₃ )₆ ] [ CO ( CN )₆ ]
- D[ Fe ( H ₂ O )₅ SCN ]⁺ and [ Fe ( H ₂ O )₅ NCS ]⁺
Correct answer
A. [ Cr ( H ₂ O )₆ ] Cl ₃ and [ Cr ( H ₂ O )₅ Cl ] Cl ₂ H ₂ O
Step-by-step solution
Solvate isomerism occurs when solvent molecules are both coordinated ligands and present as lattice entities, with identical overall formulas but differing coordination environments. Consider option A: [ Cr ( H ₂ O )₆ ] Cl ₃ has all six water molecules coordinated, while [ Cr ( H ₂ O )₅ Cl ] Cl ₂ H ₂ O has five coordinated waters and one lattice water, both corresponding to CrCl ₃ 6 H ₂ O . Option B exhibits ionization isomerism , C exhibits coordination isomerism , and D exhibits linkage isomerism . The pair demon