Al-N 三重結合のモノメリックアルミニウムイミド (イミノアラン):結合分析と分散エネルギー安定化
Joshua D Queen1, Sini Irvankoski2, James C Fettinger1
1Department of Chemistry, University of California, Davis, One Shields Avenue, Davis California, 95616, United States.
Journal of the American Chemical Society
|April 21, 2021
まとめ
この研究では,短いAl-N結合と線形幾何学を持つ新しいアルミニウムイミドArAlNArMe6を合成した. 異なるアジドとのさらなる反応により,異なるアルミニウム複合体が生み出され,オルゴアルミニウム化学が拡張された.
科学分野:
- 有機金属化学
- 無機化学
- 材料科学
背景:
- アルミイミドは,ユニークな結合特性を持つ多用途な化合物です.
- 低調整アルミニウム種の反応性を理解することは,新しい合成方法論の開発に不可欠です.
研究 の 目的:
- 大量のアリル置換剤を用いて新しいアルミニウムイミドを合成し,特徴づけること.
- アルミイミドの構造,結合,そしてスペクトル学的性質を調査する.
- 様々なアジドとのアルミイミドの反応性を調べる
主な方法:
- 低座標アルミニウム前駆体とアリルアジドの反応によるアルミニウムイミドの合成
- 単一結晶のX線微分法で構造を決定する.
- 電子構造と結合分析のための密度関数理論 (DFT) の計算.
- 特徴付けのためのUV-VisとIRスペクトロスコーピー.
主要な成果:
- アルミイミドArAlNArMe6の形成は,短いAl-N結合 (1.625-1.628 Å) と線形幾何学がある.
- DFTの計算により,線形幾何学が確認され,Al-Nボンドの多要素性についての洞察が得られました.
- 電子スペクトルは290nmで激しい移行を示し,IRスペクトロスコピーは約1100cmのAl-Nストレッチを予測した.
- 他のアジド (1-AdN3,Me3SiN3) との反応は,さまざまな反応経路を示す異なる製品をもたらした.
結論:
- この研究では,高度に不飽和のアルミニウム中心を持つ新しいアルミニウムイミドを成功裏に合成し,特徴づけました.
- Al-N結合は,複数の軌道相互作用からの貢献で,重要な共性特性を表している.
- アルミイミドの反応性はアジドの性質に依存し,多様な製品形成につながります.
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