奇数電子結合の硫黄基離子:硫黄-硫黄の3電子 σ結合のX線構造的証拠
Senwang Zhang1, Xingyong Wang, Yunxia Sui
1State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, and ‡Centre of Modern Analysis, Nanjing University , Nanjing 210093, China.
Journal of the American Chemical Society
|October 10, 2014
まとめ
1,8-カルコゲンナフタレンから,持続的な根幹カチオンが形成された. これらのカチオンは,3電子のシグマ結合を示し,一つには硫黄-硫黄結合,もう一つには希少な異原子結合がある.
科学分野:
- 有機化学 オーガニック・ケミストリー
- マテリアルサイエンス 材料科学
- コンピューティング・ケミストリー
背景:
- 1,8-カルコゲンナフタレンは,ユニークな電子特性を持つ可能性のある分子です.
- ラジカルカチオンの電子構造を理解することは,新しい材料の開発に不可欠です.
研究 の 目的:
- 1,8-カルコゲンナフタレンから派生した根性カチオンの形成と性質を調査する.
- これらの基質イオンにおける3電子シグマ結合の構造的証拠を提供すること.
主な方法:
- 1,8-カルコゲンナフタレンを1電子酸化する.
- 電子パラマグネティック共振 (EPR) スペクトロスコーピー.
- UV-VIS吸収スペクトロスコーピー. 紫外線に対する吸収スペクトロスコーピー.
- 密度関数理論 (DFT) による計算.
主要な成果:
- 溶液で生成された,持続的な根幹カチオンであるNap ((SPh) 2 (1•+) とNap ((SPh) ((SePh) (2•+) は,溶液で生成された.
- 両カチオンは3電子シグマ結合を示し,EPR,UV-vis,DFTによって確認されています.
- カチオン1•+は固体状態で安定し,2•+は結晶化時に二酸化するが,溶液中の急性カチオンを再構成する.
結論:
- 1•+で硫黄-硫黄の3電子シグマ結合の決定的な構造的証拠.
- 2•+で希少で持続する3電子シグマ結合の実証.
- カルコゲンを含むアロマティックシステムのユニークな結合能力を強調しています.
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