Metal complexes help

1. Arrange the complexes in order of decreasing stability

Answer 1

I would think the EDTA complex would be the most stable. EDTA is used to chelate some toxins and remove them from the body.

Try C A B

As for #2, a coordination number of 8 is fairly unusual, but a general guideline is that the coordination number can be 2 times the oxidation number. I’m thinking U4+ might be it.

Answer 2

Correct answer:
A.

[Mg(EDTA)]2- [Mg(H2NCH2CH2NH2)]2 Mg(OH)2

B.

U4^+

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