Bidentate nitroxide ligands stable toward oxidative redox cycling and their complexes with cerium and lanthanum

Chemical Communications : Chem Comm
Jee Eon KimEric J Schelter

Abstract

We report the synthesis of 1,3-bis[(2′-tertbutyl)hydroxyaminophenyl]benzene (H2arene-diNOx) and its metal complexes, Ce(arene-diNOx)2 (1) and [(py)2K(18-crown-6)][La(arene-diNOx)2] (2). Electrochemical studies demonstrated that the H2arene-diNOx, bidentate nitroxide ligands significantly stabilized the Ce(IV/III) redox couple to −1.74 V versus Fc/Fc(+). Moreover, a reversible oxidation wave was observed for 1 at −0.37 V, leading to a novel, stable redox-active nitroxide ligand. DFT calculations confirmed that the observed oxidation is assignable to one of the nitroxide groups.

References

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Citations

Dec 23, 2015·Inorganic Chemistry·Jee Eon KimEric J Schelter
Jul 4, 2017·Inorganic Chemistry·Jochen FriedrichReiner Anwander
Aug 12, 2017·Chemistry : a European Journal·Alexander V ZabulaEric J Schelter
Jul 13, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Jochen FriedrichReiner Anwander
Dec 14, 2016·Proceedings of the National Academy of Sciences of the United States of America·Justin A BogartEric J Schelter
Sep 24, 2020·Chemistry : a European Journal·Moya A Hay, Colette Boskovic
Jun 25, 2016·Inorganic Chemistry·Tiffany A PhamKenneth N Raymond
Dec 19, 2016·Inorganic Chemistry·Jessica R LevinEric J Schelter

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