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EDTA and Bonding Sites

Posted: Sun Nov 26, 2017 11:31 pm
by Kathleen Vidanes 1E
Can someone please explain how EDTA has 6 bonding sites? Thank you.

Re: EDTA and Bonding Sites

Posted: Sun Nov 26, 2017 11:34 pm
by Vincent Chiang 1L
EDTA is a ligate, so it has 4 binding sites with oxygen and 2 binding sites with nitrogen.

Re: EDTA and Bonding Sites

Posted: Mon Nov 27, 2017 10:15 am
by VahagnAldzhyan
Vincent Chiang 1I wrote:EDTA is a ligate, so it has 4 binding sites with oxygen and 2 binding sites with nitrogen.

What exactly is a ligate?

Re: EDTA and Bonding Sites

Posted: Mon Nov 27, 2017 12:30 pm
by Sheel Shah 1H
I believe the former response meant to say "polydentate," which essentially means that the ligand can bond to two or more bonding sites simultaneously. EDTA has six bonding sites making it a hexadentate ligand; it can bond at up to six bonding sites simultaneously.

This is of great importance, especially when considering the determination of the coordination number!

Hope that helps!

Re: EDTA and Bonding Sites  [ENDORSED]

Posted: Mon Nov 27, 2017 2:16 pm
by Chem_Mod
The above answers are correct, but Vincent probably meant ligand, not ligate!

Re: EDTA and Bonding Sites

Posted: Thu Nov 30, 2017 12:30 am
by Vincent Chiang 1L
Oops, I'm sorry I meant ligand.