3d (((10) グラウンドステート電子構成とリガンドフィールドの逆転に関するスペクトル学的証拠 [Cu (((CF3) 4) 1-)
Richard C Walroth1, James T Lukens1, Samantha N MacMillan1
1Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University , Ithaca, New York 14853, United States.
Journal of the American Chemical Society
|February 5, 2016
まとめ
銅三化物 ([Cu(CF3) 4) の電子構造は,高度なスペクトル検査と計算方法を用いて明らかにされた. 結果は,金属軌道よりも高いエネルギーでトリフローロメチル中心の軌道を持つユニークな電子構成を明らかにします.
科学分野:
- 無機化学
- コンピュータ化学
- スペクトロスコーピー
背景:
- 移行金属複合体の電子構造,特にフッ素リガンドを持つものは,その反応性と性質を理解するために重要である.
- [Cu ((CF3) 4) ((1-)) アニオンの特定の電子構成は,科学界で議論の対象となっている.
研究 の 目的:
- [Cu ((CF3) 4) ((1-)) 複合体の基底状態の電子構成を決定する.
- 実験と理論の組み合わせを用いて 電子構造に関する長年の論争を解決する.
主な方法:
- 紫外線/可視線/近赤外線 (UV/Vis/NIR) のスペクトロスコーピー
- 銅KエッジX線吸収光譜 (XAS)
- 1s2p共振無弾性X線散射 (RIXS) について
- 密度関数理論 (DFT),マルチプレート理論,マルチリファレンス計算.
主要な成果:
- 理論的な計算によって裏付けられた実験的スペクトロスコピカルデータは, [Cu ((CF3) 4) ]の特定の電子構成を支持する.
- 最も低い空の分子軌道 (LUMO) は主にトリフローロメチル (CF3) 性質であることが判明した.
- コンセンサス3d(10) 構成は,金属局所化された軌道がCF3中心のシグマ軌道よりもエネルギーが低い反転リガンドフィールドを特徴とする.
結論:
- この研究は,より単純な銅複合体とは異なる[Cu(CF3) [4]のユニークな電子構造の強力な証拠を提供します.
- この発見は,銅中心とトリフローロメチルリガンドの間の電子相互作用を明らかにし,フッ素金属複合体の化学に関する洞察を提供します.
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