Monoanionic bis(carbene) pincer complexes featuring cobalt(I–III) oxidation states

2016 ◽  
Vol 45 (24) ◽  
pp. 9805-9811 ◽  
Author(s):  
Abdulrahman D. Ibrahim ◽  
Kenan Tokmic ◽  
Marshall R. Brennan ◽  
Dongyoung Kim ◽  
Ellen M. Matson ◽  
...  
Keyword(s):  
Cobalt Complexes ◽  
Oxidation States ◽  
Pincer Complexes ◽  
Synthesis And Characterization

The synthesis and characterization of a series of cobalt complexes featuring a pincer bis(carbene) ligand of the meta-phenylene-bridged bis-N-heterocyclic carbene (ArCCC, Ar = 2,6-diispropylphenyl or mesityl) are reported.

scholarly journals Synthesis and characterization of bis- and tris-carbonyl Mn(I) and Re(I) PNP pincer complexes

2018 ◽  
Vol 150 (1) ◽  
pp. 111-119 ◽  
Author(s):  
Mathias Glatz ◽  
Jan Pecak ◽  
Lena Haager ◽  
Berthold Stoeger ◽  
Karl Kirchner
Keyword(s):  
Pincer Complexes ◽  
Synthesis And Characterization

scholarly journals H/D Exchange Under Mild Conditions in Arenes and Unactivated Alkanes with C6D6 and D2O Using Rigid, Electron-rich Iridium PCP Pincer Complexes

2020 ◽  
Author(s):  
Joel D. Smith ◽  
George Durrant ◽  
Daniel Ess ◽  
Warren Piers
Keyword(s):  
Hydrogen Isotope ◽  
Isotope Exchange ◽  
Room Temperature ◽  
Pincer Complexes ◽  
Synthesis And Characterization ◽  
Hydrogen Isotope Exchange ◽  
Mild Conditions ◽  
Highly Active ◽  
Pcp Pincer

<div>The synthesis and characterization of an iridium polyhydride complex (Ir-H4)</div><div>supported by an electron-rich PCP framework is described. This complex readily loses molecular</div><div>hydrogen allowing for rapid room temperature hydrogen isotope exchange (HIE) at the hydridic</div><div>positions and the α-C-H site of the ligand with deuterated solvents such as benzene-d6, toluene-d8</div><div>and THF-d8. The removal of 1-2 equivalents of molecular H2 forms unsaturated iridium carbene</div><div>trihydride (Ir-H3) or monohydride (Ir-H) compounds that are able to create further unsaturation</div><div>by reversibly transferring a hydride to the ligand carbene carbon. These species are highly active</div><div>hydrogen isotope exchange (HIE) catalysts using C6D6 or D2O as deuterium sources for the</div><div>deuteration of a variety of substrates. By modifying conditions to influence the Ir-Hn speciation,</div><div>deuteration levels can range from near exhaustive to selective only for sterically accessible sites.</div><div>Preparative level deuterations of select substrates were performed allowing for procurement of</div><div>>95% deuterated compounds in excellent isolated yields; the catalyst can be regenerated by</div><div>treatment of residues with H2 and is still active for further reactions.</div>

Synthesis and characterization of β-triketimine cobalt complexes and their behaviour in the polymerization of 1,3-butadiene

2014 ◽  
Vol 43 (42) ◽  
pp. 15727-15736 ◽  
Author(s):  
Mohammed N. Alnajrani ◽  
Francis S. Mair
Keyword(s):  
Cobalt Complexes ◽  
Synthesis And Characterization ◽  
Molecular Weights

Cobalt II ions ligated byfac-κ3-β-triketimine ligands form bromide-bridged square-based pyramidal dimers which upon activation with MAO and fed with a constant supply of butadiene produce high-cis-1,4-polybutadiene with activities and molecular weights surpassing all previously seen for this metal.

scholarly journals Synthesis and Characterization of New Homo- and Heteronuclear Schiff Base Complexes

Proceedings ◽  
2019 ◽  
Vol 29 (1) ◽  
pp. 77
Author(s):  
Spinciu ◽  
Maxim ◽  
Pătrașcu ◽  
Popescu
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Chemical Elements ◽  
Schiff Base Complexes ◽  
Oxidation States ◽  
Synthesis And Characterization

Schiff bases are the most extensively used versatile ligands, capable of coordinating several chemical elements and stabilizing them in numerous oxidation states. [...]

Synthesis and characterization of new Pd(II) non-symmetrical Pincer complexes derived from thioether functionalized iminophosphoranes. Evaluation of their catalytic activity in the Suzuki–Miyaura couplings

2014 ◽  
Vol 749 ◽  
pp. 287-295 ◽  
Author(s):  
Sandra Ramírez-Rave ◽  
Fabiola Estudiante-Negrete ◽  
Rubén A. Toscano ◽  
Simón Hernández-Ortega ◽  
David Morales-Morales ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Pincer Complexes ◽  
Synthesis And Characterization
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