A few examples are: [Fe(CN)6]
3–, [Fe(CN)6]
4–,
[Cu(NH3)4]
2+ and [PtCl4]
2– (The chemistry of complex compounds is
Rationalised 2023-24
104
Chemistry
dealt with in detail in Unit 5) The transition metals form a large
number of complex compounds This is due to the comparatively
smaller sizes of the metal ions, their high ionic charges and the
availability of d orbitals for bond formation