強く極化されたイリジウム−アルミニウム−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
Léon Escomel1, Iker Del Rosal2, Laurent Maron2
1Laboratory of Catalysis, Polymerization, Processes and Materials, CP2M UMR 5128, Université de Lyon, Institut de Chimie de Lyon, CNRS, Université Lyon 1, ESCPE Lyon, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France.
Journal of the American Chemical Society
|March 18, 2021
まとめ
この研究では 小分子同士が協力して活性化する 新しいイリジウム-アルミニウム複合体を発見しました これらのヘテロメタリック化合物は,CO2を含むヘテロアレンの還元性分裂を容易にし,ユニークな反応経路を示している.
科学分野:
- 有機金属化学
- 協調化学
- カタリシス
背景:
- イリジウムテトラヒドリド複合体は,有機金属合成における汎用的な前駆体である.
- アルミニウム誘導体は,複合体の形成のために調整可能なルイス酸性を提供します.
- ヘテロメタリック複合体は,ユニークな協力反応性を表すことができます.
研究 の 目的:
- 新しいイリジウム-アルミニウムヘテロメタリック複合体を合成し,特徴づけること.
- これらの複合体の電子構造と結合を調査する.
- 小分子活性化におけるIr-Alモチーフの協力反応性を探求する.
主な方法:
- イリジウム-アルミニウム複合体の合成
- 顕微鏡法 (NMR,IR),結晶法,計算法 (DFT) を用いた特徴化.
- ヘテロアレン,CO2,カルボジミドを含む反応性研究
主要な成果:
- 珍しいイリジウムアルミニウム種 [Cp*IrH3Al (iBu) (OAr) ] (1) とそのピリジン添加物 (2) の形成.
- 強く偏ったAl (III) δ+-Ir (III) δ-相互作用の証拠
- CO2とAdNCOのデカルボニレーションを含むヘテロアレンの協力的還元分裂とアミディナート種の形成.
結論:
- 合成されたヘテロメタリック複合体は独特の極化Al-Ir結合を示す.
- Ir-Alモチーフは,小分子活性化における協力的反応性を示しています.
- これらの発見は,ヘテロメタリックフレームワークに基づく新しい触媒システムを開発するための道を開きます.
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