線形座標幾何学と6s-5d軌道混合の二重ランタニドメタロセンの複合体
K Randall McClain1, Colin A Gould, David A Marchiori2
1Research Department, Chemistry Division. US Navy, Naval Air Warfare Center, Weapons Division, China Lake, California 93555, United States.
Journal of the American Chemical Society
|November 23, 2022
まとめ
研究者は,既知のシリーズを拡張して,線形二価ランタニドメタロセン,Ln ((pentaisopropylcyclopentadienyl) 2を合成した. これらの化合物は,独特の電子構造と,重要なs-d軌道混合を示し,磁気特性を影響する.
科学分野:
- 無機化学
- 有機金属化学
- ランタニド化学
背景:
- 4f5d1の二重ランタニド化合物は稀である.
- ほとんどの化合物は三角形の座標幾何学を示している.
- Ln ((CpiPr5) 2の線形二価メタロセンは以前,TbとDyについて報告されていた.
研究 の 目的:
- 線形二価金属素 Ln ((CpiPr5) 2 (1-Ln) の完全なシリーズを合成し,特徴づけること.
- これらの化合物の電子構成と構造特性を調査する.
- シリーズ内の磁気特性と軌道相互作用を探求する.
主な方法:
- 塩代謝と還元反応による合成
- 単一結晶X線微分と紫外線可視光譜を用いた特徴付け.
- イットリウム (Y) とランタン (La) 化合物の電子パラマグネティック共振スペクトロスコーピー.
主要な成果:
- 線形座標幾何学と擬似D5対称性を確認したLn (CpiPr5) 2シリーズの合成に成功.
- Sm,Eu,Tm,Ybの電子構成を4fと,他のランタニドの電子構成を4f,Eu,Tm,Yb,Ybと4fと,他のランタニドの電子構成を4f,Eu,Ybと,4f,Ybと,4f,Ybと4fと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5dと5
- YおよびLa化合物において,有意なs−d軌道混合および高精度結合定数を観測した.
結論:
- 線形座標幾何学は,二価ランタニドメタルロケンの全シリーズで維持されます.
- これらの線形化合物の顕著な6s-5d軌道混合は,より弱い4f-5dスピンカップリングと相関する可能性があります.
- この研究は,二価ランタニドの有機金属化学とその電子性質の理解を拡大する.
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