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スクエア・プラナー・Th (III) 複合体の分離:Th (OC6H2tBu2-2,6-Me-4)4の合成と構造
Daniel N Huh1, Saswata Roy1, Joseph W Ziller1
1Department of Chemistry , University of California , Irvine , California 92697 , United States.
Journal of the American Chemical Society
|July 24, 2019
まとめ
平方平面幾何学を持つ新しいトリウム (III) 複合体は合成され,特徴づけられた. これらの発見は,f元素複合体のこの調整の最初の例であり,ユニークな構造と電子特性を明らかにします.
科学分野:
- 有機金属化学
- 無機化学
- 協調化学
背景:
- トリウム複合体は通常,高調整数で特徴づけられる.
- トリウムのようなf元素の低酸化状態を調査することは,その反応性を理解するために不可欠です.
- 異常な幾何学を持つ安定したf元素複合体の合成は依然として重要な課題である.
研究 の 目的:
- 新しいトーリウム (III) 複合体を合成し,結晶学的に特徴づける.
- トリウム (IV) の前駆体を還元する構造的影響を調査する.
- 電子性質と結果の Thorium (III) 種の座標幾何学を調査する.
主な方法:
- KC8またはTHFのLiを使用したTh ((OC6H2tBu2-2,6Me-4) 4) の減少.
- 合成塩の単一結晶X線微分分析
- 電子パラマグネティック共振 (EPR) スペクトロスコーピー
- 密度関数理論 (DFT) の計算
主要な成果:
- 2つの新しいトリウム (III) 複合体の分離と特徴付け: [K (THF) 5 (Et2O) ] [Th (OC6H2tBu2-2,6Me-4) ]と [Li (THF) ] [Th (OC6H2tBu2-2,6Me-4) ] .
- 金属と4つの酸素原子が共平面であるトリウム (III) イオンの前例のない正方形平面座標幾何学の発見.
- EPRのスペクトロスコピーは金属基のラジカルを 確認しました DFTの計算は6Dの低空のSOMOを 予測しています
結論:
- トリウム (IV) アリロキシド複合体の還元により,安定したトリウム (III) 種が得られる.
- 大きめのターチルブチル置換剤は,珍しい正方形の平面幾何学を強制する上で重要な役割を果たします.
- この研究は,f元素の既知の協調化学を拡張し,それらの電子構造の洞察を提供します.
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