Mistake in self-assessment exercise 23.7

[Zellmer, Robert]

The answer for SA exercise 23.7 in the textbook is incorrect.  The
question is,

"For the diethylenetriamine ligand, what are the donor atoms and
ligan types?"

The answer the given as correct is,

"C atoms, bidentate".

That is incorrect.

Donor atoms have lone-pair electrons.  The C atoms don't have
lone pairs.  The N atoms do.  There are 3 N atoms in this ligand
(hence the "tri"amine in the name).  This makes it a polydentate
ligand.

Dr. Zellmer
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