Pyridine-2,6-dicarboxylates in monomeric iron complexes – structural aspects
-
Milan Melník
and
Marian Koman
Abstract
This review includes 70 monomeric high-spin complexes of the following general compositions: [Fe(II)(η3-pdc)(L)3], [Fe(III)(η3-pdc)(L)3]+, [Fe(II)(η3-pdc)2]2− and [Fe(III)(η3-pdc)2]− (pdc = pyridine-2,6-dicarboxylate (−2)). Each Fe(II) atom has a distorted octahedral geometry. The Fe(III) atoms have a distorted octahedral geometry (most common) and in some examples have a distorted pentagonal-bipyramidal geometry. The chelating donor ligands create varieties of n-membered metallocyclic rings: ONO, OCO, NC2N, OC2N, OC2NO and OC3O. Some cooperative effects between Fe(II) and Fe(III) complexes were found and discussed. There are complexes that are examples of distortion isomerism.
Acknowledgments
The authors would like to thank the grant agency of the Slovak Republic (APVV-18-0016, Funder Id: http://dx.doi.org/10.13039/501100003194) for their financial support. This article was created with the support of the MŠVVaŠ of the Slovak Republic within the Research and Development Operation Program for the project “University Science Park of STU Bratislava” (ITMS project no. 26240220084, Funder Id: http://dx.doi.org/10.13039/501100003194) cofounded by the European Regional Development Fund.
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