多重レアアース金属とトランジションメタルの結合を持つヘテロメタリッククラスター
Kaiying Shi1, Iskander Douair2, Genfeng Feng1
1State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
Journal of the American Chemical Society
|April 7, 2021
まとめ
稀土とロジウムの結合が複数ある 最初の分子を合成しました 有機金属化学におけるこの画期的な発見は 希土金属の相互作用とその応用に関する新しい研究への道を開きます
科学分野:
- 有機金属化学
- 無機化学
- 材料科学
背景:
- 稀土 (RE) の金属結合は知られているが,複数のRE-Rh結合を持つ複合体は以前報告されていなかった.
- 新種の有機金属化合物の合成と特徴づけは,化学科学の進歩にとって極めて重要です.
研究 の 目的:
- 多数の稀土-ロジウム結合を含む分子の最初の成功合成と特徴を報告する.
- 合成された複合体におけるセリウム (Ce) の酸化状態を調査する.
- ランタン (La) とネオジム (Nd) との類似複合体の合成を調査する.
主な方法:
- d-fヘテロメタリック分子群の合成
- カリウム・グラファイトを用いたクラスタの縮小.
- X線光電子スペクトロスコーピー (XPS),磁気感受性測定,理論的な計算 (密度関数理論 - DFT,完全アクティブ空間自己一貫性フィールド - CASSCF) を使用して特徴づけました.
主要な成果:
- 複数のCe-Rh結合を持つ分子の最初の例が成功して合成されました.
- X線光電子スペクトロスコーピー,磁気データ,理論的調査により,混合のCe (III) /Ce (IV) 酸化状態が確認された.
- 複数のLa (III) -RhおよびNd (III) -Rh結合を持つ類似の複合体も合成された.
結論:
- この研究は,複数の希土金属結合を持つ複合体を生成するための新しい合成経路を提示しています.
- この発見は,これらのユニークな化合物の電子構造と結合に関する洞察を提供します.
- この研究は,複数の希土金属を含む複合物の特性と応用に関する可能性を開きます.
さらに関連する動画
![The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI 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 [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique
Published on: November 28, 2016
8.8K
09:45Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
10.7K
関連する概念動画
02:51Metal-Ligand Bonds
22.6K
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...
22.6K
02:42Valence Bond Theory
10.0K
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...
10.0K
01:19Complexation Equilibria: The Chelate Effect
827
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
827
02:58Crystal Field Theory - Octahedral Complexes
28.7K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.7K
02:57Coordination Number and Geometry
17.3K
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.
17.3K
02:34Structural Isomerism
20.5K
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...
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...
20.5K