water
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Re: water
Monodentate means a ligand can bind at one site and donate one electron pair. In the structure of water, both electron pairs are on a single central oxygen atom. That same oxygen atom cannot simultaneously bind to two sites, so water must be monodentate.
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Re: water
When figuring out whether a ligand is monodenate or polydentate, we have to look at the lone pairs. Both of the lone pairs of water are on the oxygen right next to each other. When lone pairs are on the same atom, only one can bond because the other lone pair will point away from the bonding metal atom. With only one bonding site, water is monodentate.
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Re: water
Water is monodentate because the lone pairs are too close together to be able to bond more than once.
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