Interaction | Reaction | Process     Data Page

The octahedral pink hexaaquachromium(II) complex ion undergoes ligand exchange, with an associated change in coordination number from six to four, to give the the tetrahedral, blue tetrachlorocobalt(II) complex ion.

The chloride ion ligand is physically larger than the water (aqua) ligand.

[Co(H2O)6]2+
  +  
4
Cl–
         

[CoCl4]2–
  +  
6
H2O
Reactant Page Go To Go To
Hexaaquacobolt(II) ion     Reactions Using    Reactions Forming
Chloride ion     Reactions Using    Reactions Forming
Tetrachlorocobolt(II) ion     Reactions Using    Reactions Forming
Water     Reactions Using    Reactions Forming

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

© Mark R. Leach 1999 –

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