Answer:
This is an example of coordination isomerism.
Explanation:
Coordination isomerism is a type of structural isomerism in which two or more compounds in which one is cationic part and second is anionic part and interchange of one or more ligands between cationic complex and anionic complex takes place. This is possible only when both the positive and negative ions of salt are complex and different in the distribution of ligands in cation and anion.
Some other examples of coordination isomerism are
[tex][Co(NH_{3} )_{6} ][Cr(CN)_{6} ][/tex] and [tex][Zn(NH_{3} )_{4} ][CuCl_{4} ][/tex] .