Chelateing Ligands

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Ashley Kao 1H
Posts: 50
Joined: Thu Jul 25, 2019 12:16 am

Chelateing Ligands

Postby Ashley Kao 1H » Sun Nov 24, 2019 5:05 pm

When do we know to add a ring in a chelate? Also, can someone explain what a chelate is?

Sahil Jog 1F
Posts: 126
Joined: Thu Jul 11, 2019 12:16 am

Re: Chelateing Ligands

Postby Sahil Jog 1F » Mon Nov 25, 2019 12:25 pm

A chelate is a compound where the central atom is essentially "wrapped" inside a ring created by more molecules. These molecules need to be bonded to each other in a ring shape, essentially allowing for greater stability of the entire molecule. You can tell whether a compound is a chelate or not by just looking at its Lewis Structure and what you know about its VSPER model. If the ligands are close enough to form a bond with other ligands and are able to do so without breaking the octet rule, then you would typically have a "ring" around the central transition metal, making a chelate.

Posts: 114
Joined: Fri Aug 30, 2019 12:17 am

Re: Chelateing Ligands

Postby PranaviKolla2B » Mon Nov 25, 2019 12:31 pm

Does someone have a video or online tutorial that explains this well?

Sean Cheah 1E
Posts: 105
Joined: Wed Sep 18, 2019 12:20 am

Re: Chelateing Ligands

Postby Sean Cheah 1E » Mon Nov 25, 2019 12:38 pm

Chelating ligands are polydentate ligands that are able to form a ring-like structure of atoms that includes the central metal cation. As an example, each ethylenediamine (molecular formula: C2H4(NH2)2) ligand in the compound pictured below binds the central Cobalt cation to form two such rings.

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