Which of the following sets is/are example(s) of coordination isomerism complex?
Correct answer: A. [Co(NH3)6] [Cr(CN)6] and [Co(CN6)] [Cr(NH3)6].
- A. [Co(NH3)6] [Cr(CN)6] and [Co(CN6)] [Cr(NH3)6].
- B. [Cr(H2O)5Cl]Cl2.H2O and [Cr(H2O)4Cl2]Cl.2H2O.
- C. [Co(NH3)5Br] SO3 and [Cr(NH3)5SO4]Br.
- D. [Pt(NH3)2Cl2] and [Pt(NH3)4] [PtCl4].
Explanation
When both positive and negative ions are complex, coordination isomerism may occur due to the interchange of ligands within the co-ordination sphere itself e.g. [Co(NH3)6] [Cr(CN)6] and [Co(CN)6] [Cr(NH3)6] are two co-ordination isomers, where ammonia and cyanide ligands have been changed within the coordination sphere. Choices (B), (C) and (D) are examples of hydrate isomers, ionisation isomers and polymerisation isomers, respectively.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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