Dentates

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Alyssa Parry Disc 1H
Posts: 53
Joined: Sat Jul 22, 2017 3:01 am

Dentates

Postby Alyssa Parry Disc 1H » Fri Dec 01, 2017 9:10 am

How can you figure out whether or not a command is bidentate, tridentate, polydentate, etc.? Or do you just have to memorize them?

Leanne Wong 1H
Posts: 50
Joined: Tue Oct 10, 2017 7:13 am
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Re: Dentates

Postby Leanne Wong 1H » Fri Dec 01, 2017 11:29 am

You can figure out if a molecule is monodentate, bidentate, tridentate, etc if you just draw out the lewis dot structure and see where there are lone pairs on the central atom.

Elizabeth Bamishaye 2I
Posts: 54
Joined: Fri Sep 29, 2017 7:04 am

Re: Dentates

Postby Elizabeth Bamishaye 2I » Fri Dec 01, 2017 12:53 pm

A monodentate ligand has one donor atom used to bond to the central atom or ion as they bind to the central atom or ion at one point. A bidentate ligand has 2 donor atoms used to bond to a central atom or ion at 2 points. A polydentate ligand is characterized by having more than 2 sites used to bond to a central atom or ion.

*Chelate ligand: a complex containing a ligand that forms a ring of atoms that includes the central metal atom; they bind to cations tightly.

Rucha Kulkarni 2A
Posts: 43
Joined: Fri Sep 29, 2017 7:05 am

Re: Dentates

Postby Rucha Kulkarni 2A » Sun Dec 03, 2017 3:22 pm

Then do you count the number of lone pairs or just the number of atoms having lone pairs?
Like would H2O be monodentate or bidentate?

Shannee Mak 3F
Posts: 22
Joined: Fri Sep 29, 2017 7:07 am

Re: Dentates

Postby Shannee Mak 3F » Sun Dec 03, 2017 3:51 pm

You would focus on the atoms, not the number of electron pairs on each atom, as you determine if it's monodentate, bidentate etc by how many "sites" there are.

H2O is monodentate.

Essly Mendoza 1J
Posts: 25
Joined: Fri Sep 29, 2017 7:04 am

Re: Dentates

Postby Essly Mendoza 1J » Sun Dec 03, 2017 4:56 pm

So if we're given the formula of a coordination compound, we must do the lewis structure in order to identify what type of ligand it is?

Elizabeth Ignacio 1C
Posts: 39
Joined: Fri Sep 29, 2017 7:07 am

Re: Dentates

Postby Elizabeth Ignacio 1C » Sun Dec 03, 2017 5:27 pm

Unless it's one of the more common coordination compounds where you're expected to know whether it's a bidentate etc, drawing out the Lewis diagram is the best thing to do to figure it out.


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