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アオロフィリック相互作用は水素結合と競合するのでしょうか? Ab initio計算に基づく実験的証拠と合理化
Antonio Codina1, Eduardo J Fernández, Peter G Jones
1Departamento de Química, Universidad de La Rioja Grupo de Síntesis Química de La Rioja, UA-CSIC, Madre de Dios 51, E-26004 Logroño, Spain.
Journal of the American Chemical Society
|June 6, 2002
まとめ
銀と金の複合体は,金属と金属の相互作用と水素結合によって引き起こされるユニークな構造構造を示しています. 理論的な計算により,金と金の相互作用は銀と銀よりも強く,分子構造に影響を及ぼすことが明らかになりました.
科学分野:
- 協調化化学について
- 超分子化学 超分子化学
- コンピューティング・ケミストリー
背景:
- 金属と金属の相互作用と水素結合は,協調複合体の固体構造を決定する上で極めて重要です.
- これらの非共振相互作用を理解することは,特定の性質を持つ新しい材料を設計するための鍵です.
研究 の 目的:
- フッ素化フェニルリガンドを含む銀 (((I)) と金 (((I)) 複合体を合成し,特徴づけること.
- これらの複合体における金属対金属相互作用と水素結合の相互作用を調査する.
- これらの相互作用の強さと性質を理論的に分析するために,ab initio計算を使用します.
主な方法:
- シルバー (I) 及びゴールド (I) 複合物の合成と単結晶X線微分分析.
- Ag (I) -Ag (I),Au (I) -Au (I),およびN-H...Fの水素結合相互作用を研究するためのモデルシステムでの初期計算 (HFおよびMP2レベル).
主要な成果:
- 銀複合体1は,Ag(I) -Ag(I) 相互作用とN-H...F水素結合を持つ梯子型の構造を示しています.
- ゴールドコンプレックス2は,Au(I) -Au(I) 相互作用とN-H...F水素結合の両方を持つ離散型ジマーを形成する.
- 理論的な計算により,Au (I) -Au (I) 相互作用はAg (I) -Ag (I) 相互作用よりも強いことが示されています.
- N-H...F水素結合とAu(I) -Au(I) コンタクトの強度は,金複合体において比較可能である.
結論:
- 金複合体の金属と金属の相互作用と水素結合の共存と比較可能な強さは,競争と多様な構造的取り決めにつながります.
- この発見は,金属複合体の固体状態での自己組み立てを制御する要因についての洞察を提供します.
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