Cyclometalation Reactions Involving C−Cl Bond Activation ofortho-Chlorinated Substrates with Imine as Anchoring Groups by Cobalt Complexes

2008 ◽  
Vol 27 (2) ◽  
pp. 270-275 ◽  
Author(s):  
Yue Chen ◽  
Hongjian Sun ◽  
Ulrich Flörke ◽  
Xiaoyan Li
Keyword(s):  
Bond Activation ◽  
Cobalt Complexes ◽  
Anchoring Groups

Phosphine-assisted C–H bond activation in Schiff bases and formation of novel organo cobalt complexes bearing Schiff base ligands

2018 ◽  
Vol 42 (6) ◽  
pp. 4646-4652 ◽  
Author(s):  
Hua Zhang ◽  
Junyang Xing ◽  
Yanhong Dong ◽  
Shangqing Xie ◽  
Shishuai Ren ◽  
...  
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Bond Activation ◽  
Cobalt Complexes ◽  
Schiff Base Ligands

The sp2 C–H bond activation of the HCN moiety in diphenylphosphino benzalimines was realized using CoMe(PMe3)4 with the elimination of methane.

Preparation of hydrido [CNC]-pincer cobalt complexes via selective C–H/C–F bond activation and their catalytic performances

2018 ◽  
Vol 42 (19) ◽  
pp. 15578-15586 ◽  
Author(s):  
Fei Yang ◽  
Yangyang Wang ◽  
Faguan Lu ◽  
Shangqing Xie ◽  
Xinghao Qi ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Bond Activation ◽  
Cobalt Complexes ◽  
Catalytic Performances

[CNC]-pincer Co hydrides were synthesized via selective C–H/C–F activation and catalyzed hydrosilylation of carbonyl compounds.

Formation of PCP pincer cobalt complexes with cobaltacyclopropane moieties via double Csp3–H bond activation

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19402-19408 ◽  
Author(s):  
Gengyu Zhu ◽  
Lin Wang ◽  
Hongjian Sun ◽  
Xiaoyan Li
Keyword(s):  
Carbon Atom ◽  
Bond Activation ◽  
Cobalt Complexes ◽  
Pcp Pincer

The introduction and changes of the substituents at the middle carbon atom of the preligand dipyrrolmethane have a significant impact on the reaction results.

scholarly journals Imido Cobalt Complexes with Imidyl Character

2021 ◽  
Author(s):  
alexander Reckziegel ◽  
Manjinder Kour ◽  
Beatrice Battistella ◽  
Stefan Mebs ◽  
Katrin Beuthert ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Spin Density ◽  
High Spin ◽  
Bond Activation ◽  
High Spin State ◽  
Cobalt Complexes ◽  
Spectroscopic Methods ◽  
Computational Studies ◽  
Ancillary Ligand ◽  
Unpaired Spin

We report on the synthesis of a variety of trigonal imido cobalt complexes [Co(NAryl)L<sub>2</sub>)<sup>–</sup>, (L = N(Dipp)SiMe<sub>3</sub>), Dipp = 2,6-diisopropylphenyl) bearing very long Co–NAryl bonds of around 1.75 Å. The electronic structure was interrogated using a variety of physical and spectroscopic methods indicating the first authenticated examples of cobalt bound imidyl species. Computational studies corroborate these findings and reveal that the high-spin state of these complexes gives rise to unpaired spin-density on the imide nitrogen and leads to its imidyl character. Obtained complexes are capable of intermolecular H atom abstraction from C–H bonds that yields the corresponding cobalt amides. Exchange of the Dipp-substituent on the imide by the smaller mesityl function (2,4,6-trimethylphenyl) effectuates the unexpected Me<sub>3</sub>Si shift from the ancillary ligand set to the imide nitrogen, followed by intramolecular C–H bond activation.<br>

scholarly journals Imido Cobalt Complexes with Imidyl Character

2021 ◽  
Author(s):  
alexander Reckziegel ◽  
Manjinder Kour ◽  
Beatrice Battistella ◽  
Stefan Mebs ◽  
Katrin Beuthert ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Spin Density ◽  
High Spin ◽  
Bond Activation ◽  
High Spin State ◽  
Cobalt Complexes ◽  
Spectroscopic Methods ◽  
Computational Studies ◽  
Ancillary Ligand ◽  
Unpaired Spin

We report on the synthesis of a variety of trigonal imido cobalt complexes [Co(NAryl)L<sub>2</sub>)<sup>–</sup>, (L = N(Dipp)SiMe<sub>3</sub>), Dipp = 2,6-diisopropylphenyl) bearing very long Co–NAryl bonds of around 1.75 Å. The electronic structure was interrogated using a variety of physical and spectroscopic methods indicating the first authenticated examples of cobalt bound imidyl species. Computational studies corroborate these findings and reveal that the high-spin state of these complexes gives rise to unpaired spin-density on the imide nitrogen and leads to its imidyl character. Obtained complexes are capable of intermolecular H atom abstraction from C–H bonds that yields the corresponding cobalt amides. Exchange of the Dipp-substituent on the imide by the smaller mesityl function (2,4,6-trimethylphenyl) effectuates the unexpected Me<sub>3</sub>Si shift from the ancillary ligand set to the imide nitrogen, followed by intramolecular C–H bond activation.<br>

Cyclometalation of Substrates Containing Imine and Pyridyl Anchoring Groups by Iron and Cobalt Complexes

2005 ◽  
Vol 44 (6) ◽  
pp. 975-977 ◽  
Author(s):  
Hans-Friedrich Klein ◽  
Sebnem Camadanli ◽  
Robert Beck ◽  
Diana Leukel ◽  
Ulrich Flörke
Keyword(s):  
Cobalt Complexes ◽  
Anchoring Groups

Synthesis and reactivity of silyl cobalt complexes bearing a tetradentate phosphino silyl ligand via Si–H bond activation

Polyhedron ◽  
2018 ◽  
Vol 143 ◽  
pp. 165-170 ◽  
Author(s):  
Peng Zhang ◽  
Shilu Xu ◽  
Xiaoyan Li ◽  
Xinghao Qi ◽  
Hongjian Sun ◽  
...  
Keyword(s):  
Bond Activation ◽  
Cobalt Complexes

Synthesis of [POCOP]-pincer iron and cobalt complexes via Csp3–H activation and catalytic application of iron hydride in hydrosilylation reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15660-15667 ◽  
Author(s):  
Shaofeng Huang ◽  
Hua Zhao ◽  
Xiaoyan Li ◽  
Lin Wang ◽  
Hongjian Sun
Keyword(s):  
Bond Activation ◽  
Cobalt Complexes ◽  
Pincer Ligand ◽  
Catalytic Application ◽  
Iron Hydride

Csp3–H bond activation in pincer ligand (Ph2PO(o-C6H2-(4,6-tBu2)))2CH2 (1) (POCH2OP) was achieved by Fe(PMe3)4 and CoMe(PMe3)4 to afford (POCHOP)Fe(H) (PMe3)2 (2) and (POCHOP)Co(PMe3)2 (4).

Intramolecular C(sp3)–H Bond Activation Reactions of Low-Valent Cobalt Complexes with Coordination Unsaturation

2012 ◽  
Vol 31 (20) ◽  
pp. 7040-7043 ◽  
Author(s):  
Zhenbo Mo ◽  
Dake Chen ◽  
Xuebin Leng ◽  
Liang Deng
Keyword(s):  
Bond Activation ◽  
Cobalt Complexes ◽  
Low Valent
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