scholarly journals O,N,N-Pincer ligand effects on oxidatively induced carbon–chlorine coupling reactions at palladium

2015 ◽  
Vol 44 (13) ◽  
pp. 6040-6051 ◽  
Author(s):  
Luka A. Wright ◽  
Eric G. Hope ◽  
Gregory A. Solan ◽  
Warren B. Cross ◽  
Kuldip Singh
Keyword(s):  
Structural Properties ◽  
Pincer Complexes ◽  
Coupling Reactions ◽  
Pincer Ligand ◽  
Ligand Effects

The structural properties of a series of ONN-Pd(ii) chloride pincer complexes have been shown to influence the conversion to 4-chlorotoluene upon oxidation with di-p-tolyliodonium triflate.

scholarly journals Reactions of Rh(PNP) pincer complexes with terminal alkynes: homocoupling through a ring or not at all

2020 ◽  
Vol 49 (46) ◽  
pp. 16649-16652
Author(s):  
Thomas M. Hood ◽  
Adrian B. Chaplin
Keyword(s):  
Pincer Complexes ◽  
Coupling Reactions ◽  
Terminal Alkynes ◽  
Terminal Alkyne ◽  
Pincer Ligand ◽  
Alkyne Coupling

“Switching on” a metal's capacity to promote terminal alkyne coupling reactions using a macrocyclic pincer ligand.

Effect of Hydrated Metal Salts on the Coordination Product of Cobalt(II) halide and PNP Type Ligand, 2,6-bis(di-tertbutylphosphinomethyl) pyridine

2018 ◽  
Author(s):  
Tasneem Siddiquee ◽  
Abdul Goni
Keyword(s):  
Metal Salts ◽  
Molar Ratio ◽  
Pincer Complexes ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
Pincer Ligand ◽  
Tetrahedral Geometry ◽  
X Ray ◽  
Distorted Tetrahedral Geometry ◽  
Cobalt Center

Chemical treatment of CoX<sub>2</sub><b><sup>. </sup></b>6H<sub>2</sub>O (X = Cl, Br, I) with the potentially tridentate PNP pincer ligand 2,6-bis(di-<i>tert</i>-butylphosphinomethyl)pyridine in 1:1 molar ratio results in cobalt(II) halide-PNP pincer complexes. The effect of the hydrated metal source on molecular structure and geometry of the complexes was studied by single crystal X-ray diffraction analysis. The complexes are neutral and the cobalt center adopts a penta-coordinate system with potential atropisomerization. Within the unit cell there are two distinct molecules per asymmetric unit. One of the two phosphorus atoms in the PNP ligand was observed to be partially oxidized to phosphinoxide. Disorder in the structure reflects a mixture of square pyramidal and distorted tetrahedral geometry.

Tunable Ligand Effects on Ruthenium Catalyst Activity for Selectively Preparing Imines or Amides by Dehydrogenative Coupling Reactions of Alcohols and Amines

2017 ◽  
Vol 23 (52) ◽  
pp. 12795-12804 ◽  
Author(s):  
Takafumi Higuchi ◽  
Risa Tagawa ◽  
Atsuhiro Iimuro ◽  
Shoko Akiyama ◽  
Haruki Nagae ◽  
...  
Keyword(s):  
Catalyst Activity ◽  
Ruthenium Catalyst ◽  
Coupling Reactions ◽  
Ligand Effects ◽  
Dehydrogenative Coupling

scholarly journals Cobalt Pincer Complexes in Catalytic C–H Borylation: The Pincer Ligand Flips Rather Than Dearomatizes

ACS Catalysis ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 10606-10618 ◽  
Author(s):  
Haixia Li ◽  
Jennifer V. Obligacion ◽  
Paul J. Chirik ◽  
Michael B. Hall
Keyword(s):  
Pincer Complexes ◽  
Pincer Ligand

scholarly journals Iron Pincer Complexes as Catalysts in Cross-coupling of Aryl Halides and Phenylboronic Acid

2018 ◽  
Vol 7 (4.5) ◽  
pp. 428
Author(s):  
Lolakshi Mahesh Kumar ◽  
Badekai Ramachandra Bhat
Keyword(s):  
Phenylboronic Acid ◽  
Coupling Efficiency ◽  
Cross Coupling ◽  
Pincer Complexes ◽  
Coupling Reactions ◽  
Alternative Approach ◽  
Active Metal ◽  
Phenyl Boronic Acid ◽  
Pcp Complexes ◽  
Coupling Yield

Pincer complexes with iron as active metal center were synthesized to study their catalytic activity in Suzuki-Miyaura coupling reactions. Tridentate pincer ligand was synthesized by the reaction of diphenylchlorophosphine with m-aminophenol and m-phenylenediamine respectively in a 2:1 ratio in the presence of triethylamine as a base and tetrahydrofuran as solvent media. The resultant ligand was complexed with FeSO4 to obtain PCP complexes, C-1 with O and N atoms in the side arms and C-2 with both N atoms in the side arms. The synthesized complexes were examined for their C-C coupling efficiency in cross-coupling between phenyl boronic acid and para substituted halobenzenes. The research study aims to provide an alternative approach to the Pd catalyzed cross coupling methods, an otherwise subjugated method to obtain cross-coupled products. Also the study implores on the effect of variation in the side arm atom relating to the donating ability of the ligand and thereby relatively affecting the coupling yield of the catalysts.  

scholarly journals Iron Pincer Complexes as Catalysts and Intermediates in Alkyl–Aryl Kumada Coupling Reactions

2014 ◽  
Vol 34 (1) ◽  
pp. 289-298 ◽  
Author(s):  
Gerald Bauer ◽  
Matthew D. Wodrich ◽  
Rosario Scopelliti ◽  
Xile Hu
Keyword(s):  
Pincer Complexes ◽  
Coupling Reactions ◽  
Alkyl Aryl
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