en and edta
Moderators: Chem_Mod, Chem_Admin
en and edta
For en and EDTA are we only supposed to know that en is bidentate and EDTA is hexadentate?
-
- Posts: 52
- Joined: Wed Sep 18, 2019 12:18 am
Re: en and edta
yes, I think so.
For en I think we should also know the formula which is NH2CH2CH2NH2
For en I think we should also know the formula which is NH2CH2CH2NH2
-
- Posts: 102
- Joined: Sat Aug 24, 2019 12:16 am
Re: en and edta
I think it would also be good to know why en is bidentate and why edta is hexadentate.
For ethylenediamine (en), the two amine groups on the ends of the molecule can both function as ligands, which means en can create a chelating ligand ring around a transition metal, and is bidentate because it attaches coordinate covalent bonds in two locations.
For ethylenediaminetetraacetate, there are four acetate groups, which have negatively charged oxygen atoms; there also exist two lone pairs on the nitrogens from two amine groups located in the center of the molecule. Hence, edta can bind to a transition metal in 6 different locations.
For ethylenediamine (en), the two amine groups on the ends of the molecule can both function as ligands, which means en can create a chelating ligand ring around a transition metal, and is bidentate because it attaches coordinate covalent bonds in two locations.
For ethylenediaminetetraacetate, there are four acetate groups, which have negatively charged oxygen atoms; there also exist two lone pairs on the nitrogens from two amine groups located in the center of the molecule. Hence, edta can bind to a transition metal in 6 different locations.
-
- Posts: 100
- Joined: Fri Aug 02, 2019 12:15 am
-
- Posts: 52
- Joined: Wed Sep 18, 2019 12:21 am
Re: en and edta
Yes, but more specifically I would know what parts of their structures give them these characteristics and how you could identify other bidentates, hexadentates, etc.
-
- Posts: 57
- Joined: Wed Feb 20, 2019 12:16 am
Re: en and edta
It is important to know that it is a bidentate due to the Nitrogen's ability to bind to other atoms due to their lone pairs. The lone pairs are on separate atoms and not the same Nitrogen atom, but both of them.
-
- Posts: 109
- Joined: Wed Sep 30, 2020 9:59 pm
Re: en and edta
Adding on, there is also a coordination compound called diethylenetriamine (dien) that is on the naming coordination compound sheet: https://lavelle.chem.ucla.edu/wp-conten ... pounds.pdf
I memorize this together with en by looking at the number of N in their formulas:
ethylenediamine (en) >- 2N >- NH2CH2CH2NH2
diethylenetriamine (dien)>- 3N >- NH2CH2CH2NHCH2CH2NH2
I memorize this together with en by looking at the number of N in their formulas:
ethylenediamine (en) >- 2N >- NH2CH2CH2NH2
diethylenetriamine (dien)>- 3N >- NH2CH2CH2NHCH2CH2NH2
Return to “Biological Examples”
Who is online
Users browsing this forum: No registered users and 0 guests