Question 17.35

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Robert Estrada
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Joined: Fri Sep 29, 2017 7:05 am

Question 17.35

Postby Robert Estrada » Tue Nov 28, 2017 8:08 pm

Can someone please explain how determine what isomers of diaminobenzene can form chelating compounds and why?

Posts: 54
Joined: Sat Jul 22, 2017 3:00 am

Re: Question 17.35

Postby jillian1k » Wed Nov 29, 2017 2:26 pm

From my understanding, only isomer b can form a chelating complex because it is the only isomer with ligands close enough to form the bond angle (109.5 because of tetrahedral shape on N in NH2) necessary to connect both of them to the same transition metal. This forms the ring of atoms from
benzene-NH2-TM-NH2-benzene that is necessary for a chelating complex to exist.

Isomers a and c have (NH2)2 that are too far apart to both connect to the same transition metal both with a 109.5 degree angle.

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