Chelating complexes (16.33 and 16.34)

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K Honeychurch 1K
Posts: 27
Joined: Fri Sep 26, 2014 2:02 pm

Chelating complexes (16.33 and 16.34)

Postby K Honeychurch 1K » Sun Nov 16, 2014 10:34 pm

I understand that the bonding atoms in a ligand must be close together for the ligand to form a chelating complex but how close must the bonding atoms be? In 16.33, which reads "Which one of the following isomers of diaminobenzene can form chelating complexes?", the answer is only (b). Does that mean than a single atom sticking out between the two bonding atoms (as in (c)) separates the bonding atoms enough so that a complex does not form?
Also, does that mean that in 16.34 only (b) would be expected to form a chelating complex and (c) would not form one?

Vivien Ho 3L
Posts: 30
Joined: Fri Sep 26, 2014 2:02 pm

Re: Chelating complexes (16.33 and 16.34)

Postby Vivien Ho 3L » Mon Nov 17, 2014 6:36 am

Hi! In class, it was mentioned that two atoms separated by two atoms in the middle (with a shape of \_/) is the most convenient structure for bidentate ligands. According to this, the answer for both 16.33 and 16.34 is (b). There may be other possible structures but I'm not sure about those. Hope this helps!


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