Chemistry · IUPAC nomenclature of mononuclear co-ordination compounds, isomerism

The compounds _{4}\right] \boldsymbol{B r}_{2} \) and _{4}\right] \boldsymbol{C

The compounds \( \left[\boldsymbol{P t C l}_{2}\left(\boldsymbol{N} \boldsymbol{H}_{3}\right)_{4}\right] \boldsymbol{B r}_{2} \) and \( \left[\boldsymbol{P t B r}_{2}\left(\boldsymbol{N H}_{3}\right)_{4}\right] \boldsymbol{C l}_{2} \) constitute a pair of:

  • A. coordination isomers
  • B. linkage isomers
  • C. ionisation isomers
  • D. optical isomers

Step-by-step solution

The two compounds have the same overall formula but differ in which anions are coordinated to the platinum center and which are present as counterions: in the first, Cl is inside and Br outside; in the second, Br is inside and Cl outside. This is a classic example of ionization isomerism, where isomers give different ions in solution.
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