テトラシルサイクロブタディエン ((t) Bu (((2) MeSi) ((4) Si ((4)):移行金属複合体の新しいリガンドである
Kazunori Takanashi1, Vladimir Ya Lee, Tadahiro Matsuno
1Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
Journal of the American Chemical Society
|April 21, 2005
まとめ
研究者らは,テトラシルサイクロブタディエンのリガンドを含む新しいアニオンコバルト複合体を合成した. この画期的なオルガノシリコン化合物は,より重いグループ14の元素のみを含み,サイクロブタディエンの化学の範囲を拡大します.
科学分野:
- 有機金属化学 有機金属化学
- シリコン化学 シリコン化学
- 協調化化学について
背景:
- サイクロブタディエネリガンドは,有機金属化学において重要な役割を果たしますが,より重量のある同類はあまり研究されていません.
- 新しいリガンドシステムの合成と特徴づけは,協調化学の進歩に不可欠です.
- オーガノシリコン化合物は,リガンド設計のためにユニークな電子およびステリック特性を提供します.
研究 の 目的:
- テトラシルサイクロブタディエンのリガンドを併用した新しいアニオンコバルト複合体を合成し,特徴づけること.
- コバルト複合体におけるテトラシルサイクロブタディエンのリガンドの構造特性を調査する.
- サイクロブタディエンのようなリガンドを形成するより重いグループ14の元素の可能性を調査する.
主な方法:
- [R4Si4]2-.2K+とCpCo(CO) 2.2.の反応によるアニオンのコバルト複合体 [(R4Si4) Co(CO) 2) -K+ (R = SiMe tBu2) の合成
- 複合体のX線微分分析により,その正確な分子構造を決定する.
- 異なるカウンターイオンと複合剤を用いた自由アニオンと二重形の調製.
主要な成果:
- アニオンのテトラサイラサイクロブタジーンコバルト複合体の合成に成功.
- X線解析により,平面内シリル置換物を含む平面,長方形のSi4リングが明らかになった.
- テトラシルサイクロブタディエンの断片はコバルトの新しいリガンドタイプであり,第1のサイクロブタディエンのアナログで,より重いグループ14の元素のみが示されています.
結論:
- テトラシルサイクロブタディエンのリガンドは,有機金属化学における新しい構造モチーフを表しています.
- この研究は,完全により重いグループ14の元素から成るサイクロブタディエンのリガンドの最初の例を提供します.
- この発見は,協調複合体におけるより重い元素の化学を調査するための新しい道を開く.
さらに関連する動画
![The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F54498.jpg&w=3840&q=50)
12:43The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
Published on: November 28, 2016
10:42Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
Published on: December 29, 2016
関連する概念動画
02:37Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
03:45Formation of Complex Ions
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...
02:51Metal-Ligand Bonds
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
02:57Coordination Number and Geometry
For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
02:34Structural Isomerism
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
01:23Properties of Organometallic Compounds
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.