Ligand Modifications Produce Two-Step Magnetic Switching in a Cobalt(dioxolene) Complex.

ABSTRACT: Mononuclear monodioxolene valence tautomeric (VT) cobalt complexes typically exist in their low spin (l.s.) Co^III (cat^2- ) and high spin (h.s.) Co^II (sq⋅^- ) forms (cat^2- =catecholato, and sq⋅^- =seminquinonato forms of 3,5-di-^t Bu-1,2-dioxolene), which reversibly interconvert via temperature-dependent intramolecular electron transfer. Typically, the remaining four coordination sites on cobalt are supported by a tetradentate ligand whose properties influence the temperature at which VT occurs. We report that replacing one chelating pyridyl arm of tris(2-pyridylmethyl)amine (tpa) with a weaker field ortho-anisole moiety facilitates access to a third magnetic state, and examine a series of related complexes. Variable

SUBMITTER: Kc K 

PROVIDER: S-EPMC10615740 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature