Question

Which of the following is/are correct regarding polymerisation isomerism?

• A. Polymerisation isomers differ in molecular formula and molecular weight.
• B. $\left[Pt\right(N{H}_3{)}_{2}C{l}_2]$ and $\left[Pt\right(N{H}_3{)}_4\left]\right[PtC{l}_4]$
  are polymerisation isomers.
• C. $\left[Pt\right(N{H}_3{)}_4\left]\right[Pt(N{H}_3{)}_{2}C{l}_3{]}_2$ and $\left[Pt\right(N{H}_3{)}_{3}Cl{]}_2\left[PtC{l}_4\right]$ are polymerisation isomers.
• D. All of the above.

Answer 1

The correct option is D All of the above.

Polymerisation Isomerism:
A special case of coordination isomerism but not a true isomerism in which compounds differ from each other in molecular formula and molecular weight.
Examples:

1. $\left[Pt\right(N{H}_3{)}_{2}C{l}_2]$ and $\left[Pt\right(N{H}_3{)}_4\left]\right[PtC{l}_4]$
2. $\left[Pt\right(N{H}_3{)}_4\left]\right[Pt(N{H}_3{)}_{2}C{l}_3{]}_2$ and $\left[Pt\right(N{H}_3{)}_{3}Cl{]}_2\left[PtC{l}_4\right]$