カーボラン基のピンチャー:SeBSeとSBS Pd (II) コンプレクスの合成と構造
Alexander M Spokoyny1, Matthew G Reuter, Charlotte L Stern
1Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
Journal of the American Chemical Society
|July 9, 2009
まとめ
研究者らは,m-カルボランを用いて,新しいボロンに富んだピンサー複合体を合成した. これらのパラジウム金属複合体は,ユニークなPd-B(2) 結合を特徴としており,興味深い電子特性を持つ最初のボロン金属ピンチャー構造を表しています.
科学分野:
- 有機金属化学 有機金属化学
- ボロン化学 ボロン化学
- 協調化化学について
背景:
- ピンサー複合体は,協調化学における多用途リガンドである.
- カーボラン,特にm-カーボランは,ユニークな電子的および構造的性質を備えています.
- 新しい金属-ボロン結合の開発は,依然として活発な研究分野です.
研究 の 目的:
- ボロンに富んだ新しいピンサー複合体の合成について報告する.
- パラジウムとボロンを含む新しい調整モチーフを探求する.
- m-カルボランケージがもたらす電子特性を調査する.
主な方法:
- 独立した経路によるSeBSeとSBSのピンサーリガンドの合成.
- パラジウムによるリガンドのメタライゼーション(II).
- 結果として生じるボロン金属ピンサー複合体の特徴.
主要な成果:
- m-カルボランから派生した独特の,ボロンに富んだピンサー複合体の成功合成.
- チオエーテルまたはセレノエーテルリガンドによってケラートされたPd-B(2) 結合の形成.
- ボロン・メタル・ピンチャー・コンプレックスの最初の例の実証.
結論:
- 合成された複合体は,ボロン金属ピンサー化合物の新しいクラスを表しています.
- m-カルボランケージは,これらの複合体の電子特性に大きな影響を与える.
- これらの発見は,ボロンを含む協調化合物のさらなる探査の道を開く.
関連する概念動画
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
03:24Hybridization of Atomic Orbitals I
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...
03:35Hybridization of Atomic Orbitals II
sp3d and sp3d 2 Hybridization
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...
02:52VSEPR Theory and the Basic Shapes
Overview of VSEPR Theory
02:38Valence Bond Theory and Hybridized Orbitals
According to valence bond theory, a covalent bond results when: (1) an orbital on one atom overlaps an orbital on a second atom, and (2) the single electrons in each orbital combine to form an electron pair. The strength of a covalent bond depends on the extent of overlap of the orbitals involved. Maximum overlap is possible when the orbitals overlap on a direct line between the two nuclei.
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...