The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Vincent Artero - One of the best experts on this subject based on the ideXlab platform.
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Hydrogen evolution reaction mediated by an all-sulfur trinuclear Nickel Complex
Chemical Communications, 2020Co-Authors: Cyril Pieri, Anirban Bhattacharjee, Alexandre Barrozo, Bruno Faure, Michel Giorgi, Jennifer Fize, Marius Réglier, Martin Field, Maylis Orio, Vincent ArteroAbstract:We report the synthesis and the characterization of a trinuclear Nickel Complex. Solid state and solution studies using X-ray diffraction, NMR and UV-vis spectroscopy highlight the square planar geometries around the metal centers and an all-sulfur coordination sphere. It exhibits significant electrocatalytic activity for hydrogen evolution in DMF using Et3NHCl as the proton source. DFT studies suggest that sulfur atoms act as proton relay, as proposed in [NiFe] hydrogenases.
Yumiko Nakajima - One of the best experts on this subject based on the ideXlab platform.
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direct silyl heck reaction of chlorosilanes
Organic Letters, 2018Co-Authors: Kazuhiro Matsumoto, Jiadi Huang, Yuki Naganawa, Haiqing Guo, Teruo Beppu, Kazuhiko Sato, Shigeru Shimada, Yumiko NakajimaAbstract:A Nickel Complex/Lewis acid combination effectively catalyzed the direct silyl–Heck reaction of chlorosilanes, which are key raw materials in the organosilicon industry, to give synthetically important alkenylsilane products. Trichlorosilanes, dichlorosilanes, and monochlorosilanes underwent the silyl–Heck reaction to afford the corresponding alkenylsilanes in high yields. In the reactions of dichlorosilanes, a single substitution occurred to give monoalkenylsilanes in a highly selective manner.
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Direct Silyl–Heck Reaction of Chlorosilanes
Organic letters, 2018Co-Authors: Kazuhiro Matsumoto, Jiadi Huang, Yuki Naganawa, Haiqing Guo, Kazuhiko Sato, Shigeru Shimada, Beppu Teruo, Yumiko NakajimaAbstract:A Nickel Complex/Lewis acid combination effectively catalyzed the direct silyl–Heck reaction of chlorosilanes, which are key raw materials in the organosilicon industry, to give synthetically important alkenylsilane products. Trichlorosilanes, dichlorosilanes, and monochlorosilanes underwent the silyl–Heck reaction to afford the corresponding alkenylsilanes in high yields. In the reactions of dichlorosilanes, a single substitution occurred to give monoalkenylsilanes in a highly selective manner.
James P Morken - One of the best experts on this subject based on the ideXlab platform.
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Nickel catalyzed asymmetric kumada cross coupling of symmetric cyclic sulfates
Journal of the American Chemical Society, 2016Co-Authors: Meredith S Eno, James P MorkenAbstract:Nickel-catalyzed enantioselective cross-couplings between symmetric cyclic sulfates and aromatic Grignard reagents are described. These reactions are effective with a broad range of substituted cyclic sulfates and deliver products with asymmetric tertiary carbon centers. Mechanistic experiments point to a stereoinvertive SN2-like oxidative addition of a Nickel Complex to the electrophilic substrate.
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Nickel-Catalyzed Asymmetric Kumada Cross-Coupling of Symmetric Cyclic Sulfates
2016Co-Authors: Meredith S Eno, James P MorkenAbstract:Nickel-catalyzed enantioselective cross-couplings between symmetric cyclic sulfates and aromatic Grignard reagents are described. These reactions are effective with a broad range of substituted cyclic sulfates and deliver products with asymmetric tertiary carbon centers. Mechanistic experiments point to a stereoinvertive SN2-like oxidative addition of a Nickel Complex to the electrophilic substrate
Stephan Enthaler - One of the best experts on this subject based on the ideXlab platform.
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application of a bis silylene Nickel Complex as precatalyst in c c bond formation reactions
ChemInform, 2013Co-Authors: Chika I. Someya, Michael Haberberger, Wenyuan Wang, Stephan Enthaler, Shigeyoshi InoueAbstract:A bis(silylene) Nickel Complex is applied in the cross-coupling reactions of aryl halides with organometallic zinc or Grignard reagents.
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Application of a Bis(silylene) Nickel Complex as Precatalyst in C—C Bond Formation Reactions.
ChemInform, 2013Co-Authors: Chika I. Someya, Michael Haberberger, Wenyuan Wang, Stephan Enthaler, Shigeyoshi InoueAbstract:A bis(silylene) Nickel Complex is applied in the cross-coupling reactions of aryl halides with organometallic zinc or Grignard reagents.
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Nickel-catalyzed C(sp^2)–C(sp^2) Cross Coupling Reactions of Sulfur-Functionalities and Grignard Reagents
Catalysis Letters, 2013Co-Authors: Chika I. Someya, Maik Weidauer, Stephan EnthalerAbstract:In the present study, the Nickel-catalyzed carbon carbon bond formation of a range of sulfur containing substrates with Grignard reagents via desulfurization has been explored. After investigation of different reaction parameters with a well-defined Nickel Complex an excellent and easy-accessible pre-catalyst was found. The obtained system was capable to convert a broad scope of substrates under mild reaction conditions. Graphical Abstract
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application of a bis silylene Nickel Complex as precatalyst in c c bond formation reactions
Chemistry Letters, 2013Co-Authors: Chika I. Someya, Michael Haberberger, Wenyuan Wang, Stephan Enthaler, Shigeyoshi InoueAbstract:In the present study the catalytic performance of a Nickel Complex stabilized by an oxygen-bridged bis(silylene) ligand was examined in cross-coupling reactions of aryl halides with organometallic ...
Cyril Pieri - One of the best experts on this subject based on the ideXlab platform.
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Hydrogen evolution reaction mediated by an all-sulfur trinuclear Nickel Complex
Chemical Communications, 2020Co-Authors: Cyril Pieri, Anirban Bhattacharjee, Alexandre Barrozo, Bruno Faure, Michel Giorgi, Jennifer Fize, Marius Réglier, Martin Field, Maylis Orio, Vincent ArteroAbstract:We report the synthesis and the characterization of a trinuclear Nickel Complex. Solid state and solution studies using X-ray diffraction, NMR and UV-vis spectroscopy highlight the square planar geometries around the metal centers and an all-sulfur coordination sphere. It exhibits significant electrocatalytic activity for hydrogen evolution in DMF using Et3NHCl as the proton source. DFT studies suggest that sulfur atoms act as proton relay, as proposed in [NiFe] hydrogenases.
