ブロックメタル-ランタニド結合:Mg-YbとMg-Ca複合体の直接比較
Sandeep Kumar Thakur1, Nil Roig2,3, Johannes Maurer1
1Inorganic and Organometallic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany.
Journal of the American Chemical Society
|April 4, 2025
まとめ
この研究は,マグネシウム-ユーテルビウム複合体を用いて最初のsブロック金属ランタニド結合を報告しています. 結合は主に静電性であり,電子の移転と多様な反応性を有し,金属間の相互作用の理解を広げている.
科学分野:
- 無機化学
- 有機金属化学
- 材料科学
背景:
- ランタニド金属結合は,通常,p-またはd-ブロック金属との相互作用に限定されます.
- Sブロックの金属・ランタニドの相互作用を理解することは,協調化学の進歩にとって極めて重要です.
研究 の 目的:
- 合成し,最初のsブロック金属ランタニド結合を特徴づける.
- 新しい複合体の電子構造と結合性質を調査する.
- 合成された化合物の反応性と電子提供特性を調べるため
主な方法:
- 独特のマグネシウム ((0) 複合体の合成, [ ((BDI*) MgNa]2.
- イテルビウム複合体 (YbN'2) 2と反応し,標的のMg-Yb複合体を形成する.
- 原子内分子とEDA-NOCVを含む広範な計算分析.
- 有効酸化状態の計算と反応性研究
主要な成果:
- [BDI*]MgNa/YbN'2で最初のsブロック金属ランタニド結合の合成が成功しました.
- 計算分析により,主に静電性Mg-YbとMg-Na結合が明らかになった.
- Mg(0) -> M(2+) の電子移転の証拠は,酸化状態の曖昧さにつながります.
- Mg- CaとMg- Yb複合体の間の反応性の差異が観察され,Mg- Ybはより強力な還元剤として作用する.
結論:
- この研究は,有意な静電性を持つ新しいsブロック金属ランタニド結合を確立した.
- コンプレックスには 独特の電子特性と 調整可能な反応性があります
- この研究は,既知の金属結合の範囲を拡大し,還元化学のための新しい道を提供します.
さらに関連する動画
10:10Application of Elemental Lanthanides in the Selective C-F Activation of Trifluoromethylated Benzofulvenes Providing Access to Various Difluoroalkenes
Published on: July 28, 2018
5.9K
07:24Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
Published on: May 10, 2021
5.8K
関連する概念動画
02:58Properties of Transition Metals
28.2K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
28.2K
02:51Metal-Ligand Bonds
19.3K
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...
19.3K
02:42Valence Bond Theory
8.9K
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...
8.9K
03:02Colors and Magnetism
12.1K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.1K
01:07Ladder Diagrams: Complexation Equilibria
744
Ladder diagrams are useful for evaluating equilibria involving metal-ligand complexes. The vertical scale of the ladder diagram represents the concentration of unreacted or free ligand, pL. The horizontal lines on the scale depict the log of stepwise formation constants for metal-ligand complexes and indicate the dominant species in all the regions.
The formation constant, K1, for the formation of Cd(NH3)2+ complex from cadmium and ammonia is 3.55 × 102. Log K1 (i.e. pNH3) is 2.55, and...
The formation constant, K1, for the formation of Cd(NH3)2+ complex from cadmium and ammonia is 3.55 × 102. Log K1 (i.e. pNH3) is 2.55, and...
744
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
999
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
999