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Monica Habashy 1J wrote:If there's an H2O outside the complex, do we refer to it as hydrate or aqua?
For example: K3[Fe(CN6)]3H2O
Actually, since H2O is outside the coordination sphere (represented by the brackets), it is therefore not directly bound to the metal atom/ion (iron). Since ligands are defined as ions or molecules attached to the central metal atom/ion, H2O is not a ligand so you don't refer to it as aqua. Instead, you refer to it as hydrate.
I hope that helps.
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