Results 21 to 30 of about 1,053 (173)

Nickel(II)/BINOL-catalyzed enantioselective C–H activation via desymmetrization and kinetic resolution [PDF]

open access: yesNature Communications
The field of nickel catalysis has witnessed remarkable growth in recent years. However, the use of nickel catalysts in enantioselective C–H activation remains a daunting challenge because of their variable oxidation states, intricate coordination ...
Qi-Jun Yao   +3 more
doaj   +2 more sources

Photo-induced catalytic C−H heteroarylation of group 8 metallocenes

open access: yesCell Reports Physical Science, 2022
Summary: Possessing a characteristic sandwich-type structure, metallocenes have been widely used by the chemistry community. However, the direct catalytic C−H heteroarylation of metallocenes still remains underexplored.
Gu-Cheng He   +7 more
doaj   +1 more source

Chemical Properties of Metallocene-Filled Carbon Nanotubes to Tailor Toxicity in Plants

open access: yesBiology and Life Sciences Forum, 2023
Metallocenes are toxic chemicals that are used for the growth of carbon nanotubes (CNTs). The study of the toxicity of metallocenes on plants is very important. It governs the issues of genetics.
Marianna V. Kharlamova
doaj   +1 more source

Ionization of Decamethylmanganocene: Insights from the DFT-Assisted Laser Spectroscopy

open access: yesMolecules, 2022
Metallocenes represent one of the most important classes of organometallics with wide prospects for practical use in various fields of chemistry, materials science, molecular electronics, and biomedicine.
Sergey Ketkov   +3 more
doaj   +1 more source

Transition Metal–(μ-Cl)–Aluminum Bonding in α-Olefin and Diene Chemistry

open access: yesMolecules, 2022
Olefin and diene transformations, catalyzed by organoaluminum-activated metal complexes, are widely used in synthetic organic chemistry and form the basis of major petrochemical processes.
Ilya E. Nifant’ev   +2 more
doaj   +1 more source

High-Efficiency Mono-Cyclopentadienyl Titanium and Rare-Earth Metal Catalysts for the Production of Syndiotactic Polystyrene

open access: yesMolecules, 2023
Syndiotactic polystyrene (SPS) refers to a type of thermoplastic material with phenyl substituents that are alternately chirally attached on both sides of an aliphatic macromolecular main chain.
Bo Wen   +5 more
doaj   +1 more source

Latest News: Reactions of Group 4 Bis(trimethylsilyl)acetylene Metallocene Complexes and Applications of the Obtained Products

open access: yesChemistryOpen, 2021
Recently published reactions of group 4 metallocene bis(trimethylsilyl)acetylene (btmsa) complexes from the last two years are reviewed. Complexes like Cp’2Ti(η2‐Me3SiC2SiMe3) and Cp2Zr(py)(η2‐Me3SiC2SiMe3) with Cp’ as Cp (cyclopentadienyl) and Cp ...
Prof. Uwe Rosenthal
doaj   +1 more source

Ti Group Metallocene-Catalyzed Synthesis of 1-Hexene Dimers and Tetramers

open access: yesMolecules, 2021
1-Hexene transformations in the catalytic systems L2MCl2–XAlBui2 (L = Cp, M = Ti, Zr, Hf; L = Ind, rac-H4C2[THInd]2, M = Zr; X = H, Bu i) and [Cp2ZrH2]2-ClAlR2 activated by MMAO-12, B(C6F5)3, or (Ph3C)[B(C6F5)4] in chlorinated solvents (CH2Cl2, CHCl3, o ...
Pavel V. Kovyazin   +5 more
doaj   +1 more source

Metallocene-Filled Single-Walled Carbon Nanotube Hybrids

open access: yesNanomaterials, 2023
In this paper, the growth mechanism, structure, growth processes, growth kinetics, and optical, vibronic and electronic properties of metallocene-filled single-walled carbon nanotubes (SWCNTs) are considered.
Marianna V. Kharlamova   +1 more
doaj   +1 more source

Developments of Chiral Metallocenes as Polymerization Catalysts

open access: yesMolecules, 2005
This review article describes developments in chiral metallocenes as polymerization catalysts focusing on C2 symmetric ansa-zirconocene complexes. Selective synthesis of rac-isomers of ansa-zirconocenes are surveyed.
Takeshi Shiono, Yuushou Nakayama
doaj   +1 more source

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