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. 2021 Nov 3;10(11):2689. doi: 10.3390/foods10112689

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Optimized geometries of the most stable octahedral 1:1 complexes of Fe(II) (left) and Fe(III) (right) ions with H $_{2}$ GA $^{2 -}$ gallic acid protonation species (bond distances are given in Å).