Search Results - "Iwamoto, Takeaki"

Stable Push–Pull Disilene: Substantial Donor–Acceptor Interactions through the SiSi Double Bond by Kosai, Tomoyuki, Iwamoto, Takeaki

“…The push–pull effect has been widely used to effectively tune π-electron systems. Herein, we report the synthesis and properties of 1-amino-2-boryldisilene 1…”
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An Isolable Silicon Analogue of a Ketone that Contains an Unperturbed Si=O Double Bond by Kobayashi, Ryo, Ishida, Shintaro, Iwamoto, Takeaki

“…Despite tremendous efforts to synthesize isolable compounds with an Si=O bond, silicon analogues of ketones that contain an unperturbed Si=O bond have remained…”
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Conformationally Switchable Silylone: Electron Redistribution Accompanied by Ligand Reorientation around a Monatomic Silicon by Koike, Taichi, Nukazawa, Takumi, Iwamoto, Takeaki

“…Complexes that could be switched between two electronic states by external stimuli have attracted much attention for their potential application in molecular…”
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Cleavage of Two Hydrogen Molecules by Boryldisilenes by Kosai, Tomoyuki, Iwamoto, Takeaki

“…Activation of H2 by compounds of main‐group elements has received considerable attention. Herein, we report synthesis of novel monoboryl‐ and…”
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A Two-Coordinate Cyclic (Alkyl)(amino)silylene: Balancing Thermal Stability and Reactivity by Kosai, Tomoyuki, Ishida, Shintaro, Iwamoto, Takeaki

“…A crystalline two‐coordinate cyclic (alkyl)(amino)silylene (1) was successfully synthesized and isolated. Its 29Si NMR and UV/Vis spectra indicate that the…”
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One-Pot Condensation of a Bicyclo[1.1.1]pentasilane through Elimination of Iodotrimethylsilane Assisted by a Lewis Base by Yokouchi, Yuki, Iwamoto, Takeaki

“…Development of efficient bond formation reactions remains important in organic and main-group-element chemistry. Herein, we report the metal-free one-pot…”
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A Spiropentasiladiene Radical Cation: Spin and Positive Charge Delocalization across Two Perpendicular SiSi Bonds and UV–vis–NIR Absorption in the IR‑B Region by Honda, Shunya, Sugawara, Ryutaro, Ishida, Shintaro, Iwamoto, Takeaki

“…Spiroconjugation, that is, through-space orbital interactions between two perpendicular π orbitals, is a key concept in the contemporary molecular design of…”
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[1 + 2] Cycloaddition of a Cyclic (Alkyl)(amino)silylene and a Disilyne Providing a 3‑Aminocyclotrisilene by Koike, Taichi, Honda, Shunya, Ishida, Shintaro, Iwamoto, Takeaki

“…Despite the notable progress in the chemistry of cycloaddition reactions of silylenes toward unsaturated bonds, such reactions toward a SiSi triple bond…”
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Intermolecular C−H Activation at the Allylic/Benzylic and Homoallylic/Homobenzylic Positions of Cyclic Hydrocarbons by a Stable Divalent Silicon Species by Koike, Taichi, Kosai, Tomoyuki, Iwamoto, Takeaki

“…Direct activation of inert C(sp3)−H bonds by main group element species is yet a formidable challenge. Herein, the dehydrogenation of cyclohexene and…”
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Silacyclopropenylsilylene-NHC Complex: Synthesis by (1+2) Retro-cycloaddition, Dynamic Behavior in Solution, and Ring-expansion Reaction by Yanagisawa, Daichi, Ishida, Shintaro, Iwamoto, Takeaki

“…Stable silylene-NHC complexes have received much attention as storable equivalents of highly reactive free silylenes. We report herein the synthesis, XRD…”
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Persistent Antimony- and Bismuth-Centered Radicals in Solution by Ishida, Shintaro, Hirakawa, Fumiya, Furukawa, Ko, Yoza, Kenji, Iwamoto, Takeaki

“…Stibinyl and bismuthinyl radicals are recognized as representative intermediates of antimony and bismuth compounds, but still elusive in the condensed phase…”
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Rapid and Mild Synthesis of an NHC-Coordinated Bis(trimethylsilyl)silylene via Elimination of Halotrimethylsilane by Sasaki, Hayato, Yokouchi, Yuki, Nukazawa, Takumi, Iwamoto, Takeaki

“…Base-coordinated silylenes are often used as electron-donating ligands for metal complexes and low-coordinate species of main group elements. However, the…”
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Silyl(silylene) Coinage Metal Complexes Obtained from Isolable Cyclic Alkylsilylenes by Abe, Shunya, Inagawa, Yuichiro, Kobayashi, Ryo, Ishida, Shintaro, Iwamoto, Takeaki

“…A series of coinage metal complexes ligated by cyclic alkylsilylenes (3 M and 4 M ; M = Cu, Ag, Au) were synthesized by the reaction of the corresponding…”
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Synthesis and Reduction of a Cyclic (Alkyl)(amino)bromoborane to Generate a Thermally Labile Cyclic (Alkyl)(amino)boryl Anion by Kisu, Haruki, Kosai, Tomoyuki, Iwamoto, Takeaki, Yamashita, Makoto

“…A cyclic (alkyl)(amino)bromoborane (CAABBr) was synthesized by a reaction of the corresponding hydroborane with bromine in the presence of triethylamine…”
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1,4‐Dehydrogenation with a Two‐Coordinate Cyclic (Alkyl)(amino)silylene by Koike, Taichi, Kosai, Tomoyuki, Iwamoto, Takeaki

“…Cyclic (alkyl)(amino)silylene (CAASi) 1 has been found to successfully dehydrogenate 1,4‐dihydroaromatic compounds containing various substituents to afford…”
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An Isolable Bromosilene: Synthesis, Structure, and Substitution Reactions by Honda, Shunya, Kato, Yushi, Ishida, Shintaro, Iwamoto, Takeaki

“…Due to an intrinsically polar π-bond with a narrow π-π* gap, silenes (silicon-carbon doubly bonded compounds) should receive remarkable attention as a member…”
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An Isolable 2,4-Diaminotetrasilabicyclo[1.1.0]but-1(3)-ene: Effects of Amino Groups at the Bridge Positions by Koike, Taichi, Honda, Shunya, Iwamoto, Takeaki

“…Tetrasilabicyclo[1.1.0]but-1(3)-enes, compounds containing an Si=Si double bond with an inverted geometry, have recently emerged as a new class of stable…”
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Quantum chemical exploration of polymerized forms of polycyclic aromatic hydrocarbons: D6h tetramer and polymer of coronene by Ohno, Koichi, Satoh, Hiroko, Iwamoto, Takeaki

“…[Display omitted] •New nanostructures were discovered by quantum chemical calculations.•Capsule-form di-coronene was found to dimerize into a…”
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An Isolable Potassium Salt of a Borasilene–Chloride Adduct by Suzuki, Yuko, Ishida, Shintaro, Sato, Sota, Isobe, Hiroyuki, Iwamoto, Takeaki

“…Among the variety of isolable compounds with multiple bonds involving silicon, examples of compounds that contain silicon–boron double bonds (borasilenes)…”
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Trialkylphosphines Having a Bulky Phosphacyclopentane Backbone: Structural and Redox Properties Depending on the Exocyclic Alkyl Groups and EPR Observation of a Persistent Trialkylphosphine Radical Cation by Hirakawa, Fumiya, Nakagawa, Hiroshi, Honda, Shunya, Ishida, Shintaro, Iwamoto, Takeaki

“…Bulky phosphines and their redox properties have received increased attention in the view of useful auxiliary ligands for transition metal catalysts and…”
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