Version 1
: Received: 26 November 2023 / Approved: 27 November 2023 / Online: 27 November 2023 (08:48:07 CET)
How to cite:
Costes, J. A Few Examples of Cis Trans Isomerization in Complexes Involving the Oxamide Function. Preprints2023, 2023111672. https://doi.org/10.20944/preprints202311.1672.v1
Costes, J. A Few Examples of Cis Trans Isomerization in Complexes Involving the Oxamide Function. Preprints 2023, 2023111672. https://doi.org/10.20944/preprints202311.1672.v1
Costes, J. A Few Examples of Cis Trans Isomerization in Complexes Involving the Oxamide Function. Preprints2023, 2023111672. https://doi.org/10.20944/preprints202311.1672.v1
APA Style
Costes, J. (2023). A Few Examples of Cis Trans Isomerization in Complexes Involving the Oxamide Function. Preprints. https://doi.org/10.20944/preprints202311.1672.v1
Chicago/Turabian Style
Costes, J. 2023 "A Few Examples of Cis Trans Isomerization in Complexes Involving the Oxamide Function" Preprints. https://doi.org/10.20944/preprints202311.1672.v1
Abstract
Synthesis of heterodinuclear 3d transition metal complexes in which two metal ions are introduced in equivalent coordination sites of a ligand is quite uncommon. We have previously shown that the application of the cis-trans isomerization of the oxamido group was able to furnish such a possibility. In the present paper we demonstrate that this synthetic pathway, relying on the possibility of changing the conformation (cis vs trans) of the oxamido group, can be extended to other ligands. Although we have not been able to structurally characterize these complexes, EPR and magnetic data do confirm the efficiency of this reaction pathway. We also demonstrate that the cis-trans isomerization of the oxamido group is not due to a particular property of the ion involved in the reaction. In fact, isomerization is governed by the basicity of the reaction medium. According to the reaction condition, it is possible to favor or not this phenomenon, and to increase the accessibility to a larger number of novel genuine complexes. But the oxophilic character of the lanthanide ions impedes this isomerization in 3d-4f complexes. The very weak magnetic interactions observed in these Cu-Gd complexes can be explained thanks to spin polarization.
Chemistry and Materials Science, Inorganic and Nuclear Chemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
