Interaction | Reaction | Process     Data Page

Hexaaquairon(II) ion is complexed by three 2,2'bipyridines (bipyridyl ligands) to give stable and intense red coloured iron(II) bipyridyl complex ion and six water molecules.

The process is known as "chelation" or the "chelate (crab) effect". Chelate complexes are stable.

The intense red colour can be used to monitor the presence of iron(II) ions.


Reactant Page Go To Go To
Hexaaquairon(II) ion     Reactions Using    Reactions Forming
2,2-Bipyridine     Reactions Using    Reactions Forming
Iron(II) bipyridyl ion     Reactions Using    Reactions Forming
Water     Reactions Using    Reactions Forming

Interaction, Reaction, Process defined as:
British A-Level Chemistry: A2
Ligand Exchange (Inorganic)
Type 23 Lewis Acid/Base Complexation Chemistry

© Mark R. Leach 1999 –

Queries, Suggestions, Bugs, Errors, Typos...

If you have any:

Suggestions for links
Bug, typo or grammatical error reports about this page,

please contact Mark R. Leach, the author, using