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Husnia Safi - 1K
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Joined: Fri Sep 29, 2017 7:04 am


Postby Husnia Safi - 1K » Sun Jun 03, 2018 10:38 pm

What is a chelate? what does it have to do with ligands?

Jazmin 1H
Posts: 25
Joined: Fri Apr 06, 2018 11:01 am

Re: Chelate

Postby Jazmin 1H » Sun Jun 03, 2018 11:02 pm

I am confused about this too. In my notes, I wrote that chelate is a complex containing a ligand that forms a ring of atoms with a central metal atom, but I do not really understand what that means.

Bryan Jiang 1F
Posts: 37
Joined: Fri Apr 06, 2018 11:03 am

Re: Chelate

Postby Bryan Jiang 1F » Sun Jun 03, 2018 11:04 pm

A chelate is a structure resembling a ring that results when a special ligand associates with a central atom, usually a cation. So, it is a complex made of two parts:
1. An atom, usually a cation, that will become the central atom once it is bound by the second part of the complex, the chelating ligand.
2. The chelating ligand that binds to an atom, usually a cation, that results in an overall ring-shaped structure. This overall ring-shaped structure that results from combining an atom with a chelating ligand is referred to as a chelate.

This ligand that forms a ring of atoms that includes the central atom is referred to as a chelating ligand. A chelating ligand is special because of its ability to bind to cations tightly due to it being polydentate, or having multiple lone pairs that are involved in binding a cation. Chelating ligands are important in treating heavy-metal poisoning because of their ability to bind the metal cations tightly.

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