JoVE - Journal of Visualized Experiments
JoVE Visualize
Contact Us
このページは機械翻訳されています。他のページは英語で表示される場合があります。 View in English

SiH4を分子L(H) 2CoSiCo(H) 2Lシリシド複合体に直接変換する

  • 0Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States.
Journal of the American Chemical Society +

|

2023年1月25日

|

2023年1月25日

PubMedで要約を見る

まとめ

この要約は機械生成です。

この研究では,シリコン四水素とコバルトの断片を用いた新しい二金属シリキド複合体の合成が報告されています. シンメトリックな二コバルトシリシドが直接合成され,これらの重要な有機金属化合物への新しい経路を提供しました.

科学分野

  • 有機金属化学
  • 無機化学
  • 材料科学

背景

  • バイメタリックシリシド複合体の合成は困難です.
  • シリコン金属結合の活性化は新しい材料の開発に不可欠です.

研究 の 目的

  • バイメタリック分子シリシド複合体の合成を報告する.
  • シリコン四水素とコバルト複合体の反応性を調べる
  • 合成されたシリシドの電子的および構造的性質を調査する.

主な方法

  • 複数のSi-H結合が金属中心で活性化している.
  • 特定のリガンド (Tp′′と[BP2Pz]) を含む14電子のLCo(I) 断片の使用.
  • 密度関数理論 (DFT) 研究と固体分子構造分析.

主要な成果

  • (Tp′′Co) 2 ((μ-N2) とSiH4の反応により (Tp′′Co) 2 ((μ-H) と (Tp′′Co) 2 ((μ-H) 2) が得られる.
  • [BP2Pz]がサポートされたCo複合体は,シリレンとシリシド複合体を形成するSi-H酸化添加物をもたらした.
  • [BP2Pz](H) 2CoSiCo(H) 2[BP2Pz]という対称な二コバルトシリシドが直接合成された.
  • シリケイド複合体は,CO,DMAP,MeClに対する反応性を示し,μ-シリコン原子の機能化につながった.

結論

  • [BP2Pz]リガンドはSi-Hの酸化添加と二金属シリシドの形成を促進する.
  • 合成された二コバルトシリシドは,対称バイメタリックシリシドへの新しく直接的な経路を表しています.
  • シリケイド複合体のμ-シリコン原子は,オルガノシランを形成するために機能化することができる.

関連する概念動画

Preparation and Reactions of Sulfides 02:26

5.0K

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

Asymmetrical sulfides can be synthesized by treating thiols with an alkyl halide and a...

Formation of Complex Ions 03:45

23.9K

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...

Lewis Structures of Molecular Compounds and Polyatomic Ions 02:54

35.1K

To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:


Determine the total number of valence (outer shell) electrons. For cations, subtract one electron for each positive charge. For anions, add one electron for each negative charge.
Draw a skeleton structure of the molecule or ion, arranging the atoms around a central atom. (Generally, the least electronegative element should be placed in the center.) Connect...

Hybridization of Atomic Orbitals I 03:24

47.5K

The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...

Hybridization of Atomic Orbitals II 03:35

32.7K

sp3d and sp3d 2 Hybridization

To describe the five bonding orbitals in a trigonal bipyramidal arrangement, we must use five of the valence shell atomic orbitals (the s orbital, the three p orbitals, and one of the d orbitals), which gives five sp3d hybrid orbitals. With an octahedral arrangement of six hybrid orbitals, we must use six valence shell atomic orbitals (the s orbital, the three p orbitals, and two of the d orbitals in its valence shell), which gives six sp3d 2 hybrid...

Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride 01:26

1.9K

Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation...