Controlling Valence Tautomerism of Cobalt Complexes Containing the Benzosemiquinone Anion as Ligand

1993 ◽  
Vol 32 (6) ◽  
pp. 880-882 ◽  
Author(s):  
David M. Adams ◽  
Andrea Dei ◽  
Arnold L. Rheingold ◽  
David N. Hendrickson
Keyword(s):  
Cobalt Complexes ◽  
Valence Tautomerism

Redox Activity and Two-Step Valence Tautomerism in a Family of Dinuclear Cobalt Complexes with a Spiroconjugated Bis(dioxolene) Ligand

2013 ◽  
Vol 135 (22) ◽  
pp. 8304-8323 ◽  
Author(s):  
Kerwyn G. Alley ◽  
Giordano Poneti ◽  
Peter S. D. Robinson ◽  
Ayman Nafady ◽  
Boujemaa Moubaraki ◽  
...  
Keyword(s):  
Cobalt Complexes ◽  
Redox Activity ◽  
Valence Tautomerism

scholarly journals Rich Redox-Activity and Solvatochromism in a Family of Heteroleptic Cobalt Complexes

2021 ◽  
Author(s):  
Vincent L. Nadurata ◽  
Moya Hay ◽  
Jett Tao Janetzki ◽  
Gemma Kate Gransbury ◽  
Colette Boskovic
Keyword(s):  
Charge Transfer ◽  
Cobalt Complexes ◽  
Redox Activity ◽  
Redox Active Ligands ◽  
Valence Tautomerism ◽  
Redox Active ◽  
Active Metal ◽  
Metal Redox ◽  
Redox Active Metal

The combination of redox-active metals with redox-active ligands can lead to interesting charge transfer behaviours, including valence tautomerism and solvatochromism. With the aim of investigating a relatively underexplored redox-active metal/redox-active...

Theoretical Study of the Mechanism of Valence Tautomerism in Cobalt Complexes

2010 ◽  
Vol 114 (49) ◽  
pp. 12928-12935 ◽  
Author(s):  
Daisuke Sato ◽  
Yoshihito Shiota ◽  
Gergely Juhász ◽  
Kazunari Yoshizawa
Keyword(s):  
Theoretical Study ◽  
Cobalt Complexes ◽  
Valence Tautomerism

Toward a Comprehensive Treatment of Tautomerism in Chemoinformatics Including in InChI V2

2019 ◽  
Author(s):  
Devendra K. Dhaked ◽  
Wolf Ihlenfeldt ◽  
Hitesh Patel ◽  
Marc Nicklaus
Keyword(s):  
Small Molecule ◽  
Comprehensive Treatment ◽  
Experimental Literature ◽  
Web Tool ◽  
Valence Tautomerism ◽  
Standard Version ◽  
Small Molecule Databases

<p>We have collected 86 different transforms of tautomeric interconversions. Out of those, 54 are for prototropic (non-ring-chain) tautomerism; 21 for ring-chain tautomerism; and 11 for valence tautomerism. The majority of these rules have been extracted from experimental literature. Twenty rules – covering the most well-known types of tautomerism such as keto-enol tautomerism – were taken from the default handling of tautomerism by the chemoinformatics toolkit CACTVS. The rules were analyzed against nine differerent databases totaling over 400 million (non-unique) structures as to their occurrence rates, mutual overlap in coverage, and recapitulation of the rules’ enumerated tautomer sets by InChI V.1.05, both in InChI’s Standard and a Non-Standard version with the increased tautomer-handling options 15T and KET turned on. These results and the background of this study are discussed in the context of the IUPAC InChI Project tasked with the redesign of handling of tautomerism for an InChI version 2. Applying the rules presented in this paper would approximately triple the number of compounds in typical small-molecule databases that would be affected by tautomeric interconversion by InChI V2. A web tool has been created to test these rules at https://cactus.nci.nih.gov/tautomerizer.</p>

Cobaloxime-Based Double Complex Salts as Efficient and Versatile Catalysts for the Light-Driven Hydrogen Evolution Reaction

2020 ◽  
Author(s):  
Elisabeth Hofmeister ◽  
Jisoo Woo ◽  
Tobias Ullrich ◽  
Lydia Petermann ◽  
Kevin Hanus ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Systematic Study ◽  
Cobalt Complexes ◽  
Spectroscopic Studies ◽  
Double Complex ◽  
Double Complex Salts ◽  
Noble Metal Catalysts ◽  
Reduction Potentials ◽  
Complex Salts

Cobaloximes and their BF<sub>2</sub>-bridged analogues have emerged as promising non-noble metal catalysts for the photocatalytic hydrogen evolution reaction (HER). Herein we report the serendipitous discovery that double complex salts such as [Co(dmgh)<sub>2</sub>py<sub>2</sub>]<sup>+</sup>[Co(dmgBPh<sub>2</sub>)<sub>2</sub>Cl<sub>2</sub>]<sup>-</sup> can be obtained in good yields by treatment of commercially available [Co(dmgh)<sub>2</sub>pyCl] with triarylboranes. A systematic study on the use of such double complex salts and their single salts with simple counterions as photocatalysts revealed HER activities comparable or superior to existing cobaloxime catalysts and suggests ample opportunities for this compound class in catalyst/photosensitizer dyads and immobilized architectures. Preliminary electrochemical and spectroscopic studies indicate that one key advantage of these charged cobalt complexes is that the reduction potentials as well as the electrostatic interaction with charged photosensitizers can be tuned.

scholarly journals Paramagnetic solid-state NMR assignment and novel chemical conversion of the aldehyde group to dihydrogen ortho ester and hemiacetal moieties in copper(ii)- and cobalt(ii)-pyridinecarboxaldehyde complexes

RSC Advances ◽  
2021 ◽  
Vol 11 (33) ◽  
pp. 20216-20231
Author(s):  
Ayelén F. Crespi ◽  
Verónica M. Sánchez ◽  
Daniel Vega ◽  
Ana L. Pérez ◽  
Carlos D. Brondino ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Assignment ◽  
Cobalt Complexes ◽  
Chemical Conversion ◽  
Aldehyde Group ◽  
Ortho Ester ◽  
Complex Chemical ◽  
Chemical Functionalization

The complex chemical functionalization of the aldehyde group was elucidated in copper and cobalt complexes for 4- and 3-pyridinecarboxaldehyde ligands.

scholarly journals Structural, Magnetic, and Electrochemical Characterization of Iron(III) and Cobalt Complexes with Penta‐N 3 O 2 ‐dentate Ligands

2021 ◽  
Vol 2021 (15) ◽  
pp. 1498-1504
Author(s):  
Dominik Natke ◽  
Annika Preiss ◽  
Stephen Klimke ◽  
Takuya Shiga ◽  
Roman Boca ◽  
...  
Keyword(s):  
Cobalt Complexes ◽  
Electrochemical Characterization
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