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[2,6-Mes(2)C(6)H(3)](2)Ga(+)Li[Al(OCH(CF(3)) ((2)) ((4)) ((2)) ((-) (Mes = 2,4,6-Me(3)C(6)H(2)):
Rudolf J Wehmschulte1, Jared M Steele, Jackie D Young
1Department of Chemistry and Biochemistry, University of Oklahoma, 620 Parrington Oval, Room 208, Norman, Oklahoma 73019, USA.
Journal of the American Chemical Society
|February 6, 2003
まとめ
新しい2座標のガリウム化合物である[2,6-Mes(2)C(2)H(3)](2)Ga(+)Li[Al(OCH(CF(3))(2))(4)](2)(-が合成されました. この安定した化合物は,弱いルイス酸性を示し,サイクロヘクセン酸化物をポリマー化することができます.
科学分野:
- 有機金属化学 有機金属化学
- 無機化学 無機化学とは
- 協調化化学について
背景:
- 2つの座標を持つガリウム種は稀であり,ユニークな反応性を発揮します.
- 低座標主グループ要素の電子的およびステリック的性質を理解することは極めて重要です.
研究 の 目的:
- 新しい線形二座標ガリウム化合物を合成し,特徴づけること.
- 合成されたガリウム複合体の安定性とルイス酸性の調査.
- ポリメリゼーション反応における化合物の触媒的可能性を調査する.
主な方法:
- 塩化ガリウム前駆体とリチウムアルミニウムアルコキシドのメタテシス反応.
- 多核性NMR光譜を用いた特徴づけ ((1) H, (13) C, (19) F, (27) Al).
- X線結晶学による構造決定.
主要な成果:
- タイトルの化合物, [2,6-Mes(2)C(2)H(3)](2)Ga(+)Li[Al(OCH(CF(3)) ((2)) ((4)) ((2))) の合成が成功しました.
- X線結晶学により,線形C-Ga-C幾何学 (175.69(7) 度) が確認されました.
- この化合物は,顕著な安定性と弱いルイス酸性を示し,シクロヘクセン酸化物を効果的にポリメリ化する.
結論:
- この研究は,巨大なアリル基によって安定した,線形の2座標のガリウムカチオンの最初の合成を報告しています.
- 化合物の弱いルイス酸性と,酸化サイクロヘキセンのポリメリゼーション能力は,触媒の応用への道を開く.
- この研究は,低座標主群元素化学の理解を広げています.
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