Valence tautomerism and delocalization in transition metal complexes of o-amidophenolates and other redox-active ligands. Some recent results

A Rajput, AK Sharma, SK Barman, A Saha… - Coordination Chemistry …, 2020 - Elsevier
The archetypal temperature-driven valence tautomeric process 'Co III (Cat)(SQ)'⇌'Co II (SQ)
2'(spin state of cobalt changes from S= 0 to S= 3/2), where Cat 2− and SQ·− are catecholato …

Switching metal complexes via intramolecular electron transfer: connections with solvatochromism

VL Nadurata, C Boskovic - Inorganic Chemistry Frontiers, 2021 - pubs.rsc.org
Metal complexes that can exist in two different charge distributions often exhibit dramatic
color changes when switched between them. The underlying spectral changes are …

Synthesis, crystal structure, fluorescence properties, and theoretical studies of a dinuclear Ni (II) complex derived from a quinoline-containing half-salamo-type ligand

L Tong, YF Ding, X Li, LL Man… - Journal of Coordination …, 2023 - Taylor & Francis
A quinoline-containing semi-salamo-type ligand, HL, was synthesized and a dinuclear Ni (II)
complex,[Ni2 (L) 2 (NCS) 2], was produced. The complex was experimentally analyzed by …

Understanding the origin of one-or two-step valence tautomeric transitions in bis (dioxolene)-bridged dinuclear cobalt complexes

GK Gransbury, BN Livesay, JT Janetzki… - Journal of the …, 2020 - ACS Publications
Valence tautomerism (VT) involves a reversible stimulated intramolecular electron transfer
between a redox-active ligand and redox-active metal. Bis (dioxolene)-bridged dinuclear …

Putting the squeeze on valence tautomerism in cobalt-dioxolene complexes

A Summers, FZM Zahir, GF Turner, MA Hay… - Nature …, 2024 - nature.com
Molecules that can reversibly switch between electronic states under an external stimulus
are of interest to numerous applications. Complexes of open shell metal ions with redox …

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

K Kc, T Woods, L Olshansky - Angewandte Chemie, 2023 - Wiley Online Library
Mononuclear monodioxolene valence tautomeric (VT) cobalt complexes typically exist in
their low spin (ls) CoIII (cat2−) and high spin (hs) CoII (sq⋅−) forms (cat2−= catecholato, and …

Valence tautomerism and spin crossover in pyridinophane–cobalt–dioxolene complexes: an experimental and computational study

T Tezgerevska, E Rousset, RW Gable… - Dalton …, 2019 - pubs.rsc.org
Compounds [Co (L-N4R2)(dbdiox)](BPh4)(L-N4R2= N, N′-di-alkyl-2, 11-diaza [3.3]-(2, 6)
pyridinophane, R= iPr (1a), Et (2a); dbdiox= 3, 5-di-tert-butyldioxolene) and [M (L …

A New Type of Valence Tautomerism in Cobalt Dioxolene Complexes–Temperature‐Induced Transition from a Cobalt (III) Catecholate to a Low‐Spin Cobalt (II) …

C Metzger, R Dolai, S Reh, H Kelm… - … A European Journal, 2023 - Wiley Online Library
The synthesis and characterization of the monocationic cobalt (III) catecholate complex [Co
(L‐N4tBu2)(Cl2cat)]+(L‐N4tBu2= N, N'‐Di‐tert.‐butyl‐2, 11‐diaza [3.3](2, 6) pyridinophane …

Modulation of Charge Distribution in Cobalt-α-Diimine Complexes toward Valence Tautomerism

MA Hay, JT Janetzki, VJ Kumar, RW Gable… - Inorganic …, 2022 - ACS Publications
Valence tautomerism (VT) and spin crossover (SCO) are promising avenues for develo**
a range of molecular materials for sensing, memory, and optoelectronic applications …

Valence tautomerism in a cobalt–dioxolene complex containing an imidazolic ancillary ligand

AMV Guedes, LS de Abreu, IAV Maldonado… - RSC …, 2023 - pubs.rsc.org
This work reports the synthesis, structural, spectroscopic and magnetic investigation of two
complexes,[Co (bmimapy)(3, 5-DTBCat)] PF6· H2O (1) and [Co (bmimapy)(TCCat)] PF6 …