メタル・メタル・トリプル・ボンドのメタテシカル・交換

Joshua D Queen¹, Alice C Phung¹, Christine A Caputo¹

¹Department of Chemistry , University of California , One Shields Ave , Davis , California 95616 , United States.

Journal of the American Chemical Society

|January 18, 2020

まとめ

この研究は,金属対金属の三重結合を含む新しい反応を導入します. モリブデンジマーとジメタリンとのメタテシス反応により,有機金属化学を拡張した新しい分離可能な製品が形成された.

科学分野:

有機金属化学
無機化学
材料科学

背景:

金属と金属の多重結合は,触媒と材料において極めて重要です.
低値主グループ要素の反応性を理解することは,継続的な課題です.
モリブデン-モリブデン三重結合は,ユニークな反応経路を提供します.

研究の目的:

ディメタリンとモリブデン・モリブデンの三重結合の反応性を調べる.
金属同士の結合を特徴とする新しい化合物を合成し,特徴づけること.
多重金属結合を含むメタテシス反応を調査する.

主な方法:

(CO) 2CpMoMoCp(CO) 2とArMMAr (M = Ge, Sn, Pb) の反応は,軽度の条件下で行われる.
同様の単結合モリブデンジマーによるメタテシス反応.
NMR,電子,IRスペクトル,X線結晶を用いた特徴付け.

主要な成果:

2つの金属対金属の三重結合のメタテシスから最初の分離可能な産物が得られた.
ArMMoCp ((CO) 2) とArMMoCp ((CO) 2) の中等から優れた収量を達成した.
類似の交換反応により,ArM̈-MoCp ((CO) 3) が得られた.

結論:

この研究は,新種の有機金属化合物への新しい合成経路を示しています.
メタル・メタル・トリプルボンドのメタテシスは,新しいM-Mボンドを作成するための実行可能な戦略です.
特徴づけられた製品は,このユニークな種の安定性と反応性についての洞察を提供します.

さらに関連する動画

12:18

Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys

Published on: June 27, 2022

3.2K

07:49

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy

Published on: February 20, 2020

9.8K

関連する概念動画

02:32

Bonding in Metals

51.5K

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.

51.5K

02:51

Metal-Ligand Bonds

23.6K

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...

23.6K

01:23

Properties of Organometallic Compounds

1.5K

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.

1.5K

01:19

Complexation Equilibria: The Chelate Effect

1.1K

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...

1.1K

01:24

Metal-Semiconductor Junctions

818

The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...

818

02:42

Valence Bond Theory

10.9K

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...