高スピン [3M-3(μ-H) ]クラスターにおけるヒドリドブリッジの反応性 (M = FeII, CoII)
Yousoon Lee1, Kevin J Anderton1, Forrest T Sloane1
1Center for Catalysis and Department of Chemistry, University of Florida , Gainesville, Florida 32611, United States.
Journal of the American Chemical Society
|August 14, 2015
まとめ
新しい金属水化物クラスターは 選択的に二酸化炭素と反応します サイクロファンリガンドによるステリック保護は制御された反応を可能にし,火とコバルト複合体の反応性を触媒における潜在的な応用で区別する.
科学分野:
- 有機金属化学
- 協調化学
- 材料科学
背景:
- メタルヒドリドのクラスターは触媒に不可欠です.
- サイクロファンのリガンドは独特のステリック環境を提供します.
- 選択的なCO2活性化が化学における重要な課題です.
研究 の 目的:
- 新しい [3M-3(μ-H) ]クラスタを合成し,特徴づけること (M = Fe(II,Co(II)).
- これらのクラスターの不飽和基板,特にCO2との反応性を調査する.
- ハイドリドの反応性と選択性に対するサイクロファンのリガンドの影響を調べる.
主な方法:
- KBEt3Hを用いたFe3H3LとCo3H3Lのクラスタの合成
- 構造分析のための単一結晶X線微分
- CO2やその他の不飽和分子による反応性試験
主要な成果:
- ステリカルに保護されたヒドリドリガンドは,X線分析によって確認された.
- CS2,アルキン,ニトリルと選択的に反応した.
- 室温反応により,異なる水素反応性を示すモノアダクト (Fe3 ((OCHO) ((H) 2LとCo3 ((OCHO) ((H) 2L) が得られた.
- 高温反応では,Fe3H3Lが三添加物 (Fe3(OCHO) 3Lを形成し,Co3H3Lは単添加物として残った.
結論:
- サイクロファンのリガンドはヒドリドリガンドを効果的にシールドし,選択的なCO2反応を誘導する.
- 鉄とコバルトのクラスターにおけるヒドリドリガンドの異なる反応性が観察された.
- これらの発見は,選択的なガス捕獲と変換のための金属複合体の設計に関する洞察を提供します.
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