ハイドラジン捕獲とN-N結合割れは,柔軟な添加ルイス酸によって可能
John J Kiernicki1, Matthias Zeller2, Nathaniel K Szymczak1
1Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109, United States.
Journal of the American Chemical Society
|December 12, 2017
まとめ
この研究は,ヒドラジンと結合するボラン群を持つ新しい鉄複合体を詳細に示しています. 還元により,ボランで安定した希少な鉄-ダイアミド複合体が生成され,アンモニアが放出されます.
科学分野:
- 有機金属化学
- ボラン化学
- 協調化学
背景:
- ピンサーベースの鉄複合体は多用途の触媒です.
- ハイドラジン (N2H4) は化学における重要な窒素源である.
- Lewis酸性サイトは小さな分子を活性化します.
研究 の 目的:
- 付属ボランを添加したピンチベースのFe (II) 複合体を合成し,特徴づけること.
- この複合体へのヒドラジンの結合を調査する
- 結果の種の反応性,特に還元とリガンド交換を調査する.
主な方法:
- 9-ボラビサイクロ[3.3.1]ノニル置換剤を含むピンチベースのFe(II) 複合体の合成.
- ハイドラジン (N2H4) の結合に関する調整研究
- Fe:N2H4複合体の還元変換
- プロトネーションとリガンド交換実験
主要な成果:
- Fe(II) コンプレックスはルイス酸性を示し,1〜2等価のヒドラジン結合を可能にします.
- 1:1 Fe:N2H4アダクトの還元により,独特のFe ((NH2) 2複合体が形成される.
- Fe ((NH2) 2複合体のアミドリガンドは,ボラン群との相互作用によって安定化される.
- 陽子化によってアンモニア (NH3) が放出され,外因的なヒドラジン交換が可能になる.
結論:
- 付属ボランを持つピンサーベースのFe (II) コンプレックスは,ヒドラジン誘導体を活性化し安定させることができる.
- 開発されたシステムは 希少な鉄ダイアミド種への道を開きます
- このシステムは,窒素を含むリガンドの制御された放出と交換の可能性を示しています.
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