Thermally robust α-diimine nickel and cobalt complexes for Cis-1,4 selective 1,3-butadiene polymerizations

Cobaloximes and their BF2-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)2py2]+[Co(dmgBPh2)2Cl2]- can be obtained in good yields by treatment of commercially available [Co(dmgh)2pyCl] 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.

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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 ◽

10.1039/d1ra02512k ◽

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.

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

European Journal of Inorganic Chemistry ◽

10.1002/ejic.202100081 ◽

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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ChemInform Abstract: TRANSITION METAL METHYLENE COMPLEXES, IV. NOVEL METHYLENE COBALT COMPLEXES

Chemischer Informationsdienst ◽

10.1002/chin.197821305 ◽

1978 ◽

Vol 9 (21) ◽

Author(s):

W. A. HERRMANN

Keyword(s):

Transition Metal ◽

Cobalt Complexes

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Cyclobutadiene cobalt complexes as catalysts for insertion of diazo compounds into X–H bonds

Mendeleev Communications ◽

10.1016/j.mencom.2021.05.022 ◽

2021 ◽

Vol 31 (3) ◽

pp. 350-351

Author(s):

Nikita V. Shvydkiy ◽

Dmitry S. Perekalin

Keyword(s):

Cobalt Complexes ◽

Diazo Compounds

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One-pot synthesis of cobalt complexes with 2,6-bis(arylimino)phenoxyl/phenthioxyl ligands and catalysis on isoprene polymerization

Dalton Transactions ◽

10.1039/d1dt00371b ◽

2021 ◽

Vol 50 (15) ◽

pp. 5218-5225

Author(s):

Xue-Meng Chen ◽

Li-Cheng Huang ◽

Wei Gao

Keyword(s):

Mixed Valence ◽

Cobalt Complexes ◽

One Pot ◽

One Pot Synthesis ◽

Isoprene Polymerization

Several cobalt complexes supported by 2,6-bis(arylimino)phenoxyl/phenthioxyl ligands κ2N,X-Ar[NXN]CoCl(THF) were synthesized by direct oxygen(sulfur) insertion into the C–Co bond of the mixed-valence cobalt complexes {κ2C,N,η6-Ar[NCN]Co-κN-CoCl(μ-Cl)}2.

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