ligands and dentates

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josephyim1L
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

ligands and dentates

Postby josephyim1L » Tue Nov 27, 2018 12:04 am

Can someone explain what a ligand is, how to identify it, and what it means that a ligand binds at "monodentate" or "bidentate"?

Elena Saab 4A
Posts: 43
Joined: Fri Sep 28, 2018 12:27 am

Re: ligands and dentates

Postby Elena Saab 4A » Tue Nov 27, 2018 10:03 am

A ligand is any electron rich species that forms 1 or more bonds with a cation. A mono dentate bonds with a cation at 1 site, so it donates 1 electron pair. A Bidentate bonds at 2 sites, and donates 2 electron pairs. A tridentate bonds at 3 sites, and a hexadendate bonds at 6 sites.

whitney_2C
Posts: 74
Joined: Fri Sep 28, 2018 12:28 am

Re: ligands and dentates

Postby whitney_2C » Tue Nov 27, 2018 12:33 pm

A ligand is a species that has at least one set of unpaired electrons that it uses to form a coordinate covalent bond with a metal atom. Monodentate means that it has one set of unpaired electrons that it donates to create the bond whereas bidentate means that it has two sets of unpaired electrons that it can donate to form two different coordinate covalent bonds.

Mayaal_Khan_4H
Posts: 41
Joined: Fri Sep 28, 2018 12:28 am

Re: ligands and dentates

Postby Mayaal_Khan_4H » Tue Nov 27, 2018 1:24 pm

A ligand is an atom or molecule attached to a central atom, usually a metallic element, in a coordination or complex compound.
Ligands must have one or more lone pairs, they bind at:
1 site---> donate 1e- pair ---> Monodentate
2 sites--->donate 2e- pair ---> Bidentate
3 sites--->donate 3e- pair ---->Tridentate
6 sites--->donate 6e- pair ---> Hexadentate


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