稀土茂金属烷基铝引发独特的四氢呋喃活化。
Rare-earth-metallocene alkylaluminates trigger distinct tetrahydrofuran activation.
机构信息
Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany.
出版信息
Chem Commun (Camb). 2021 Aug 10;57(64):7918-7921. doi: 10.1039/d1cc03024h.
Thermal treatment of Cp2YMe(thf) (Cp = C5Me5), obtained from Cp2Y(AlMe4) via donor-induced AlMe3 cleavage, in THF resulted in the concomitant formation of vinyl oxide Cp2Y(OC2H3)(thf) and 2-ethylene-tetrahydrofuranyl complex Cp2Y(2-C2H4-OC4H7) via the release of methane. In stark contrast, dissolving Cp2La(AlMe4) in THF/n-hexane led to the quantitative formation of AlMe3-stabilized 2-tetrahydrofuranyl complex Cp*2La(2-AlMe3-OC4H7), with methane elimination.
Cp2YMe(thf)（Cp = C5Me5）通过施主诱导的 AlMe3 裂解从 Cp2Y(AlMe4)获得，在 THF 中进行热处理会导致同时形成乙烯氧化物 Cp2Y(OC2H3)(thf)和 2-乙烯基四氢呋喃络合物 Cp2Y(2-C2H4-OC4H7)，通过释放甲烷。相比之下，将 Cp2La(AlMe4)溶解在 THF/正己烷中会导致定量形成甲烷消除的 AlMe3 稳定的 2-四氢呋喃络合物 Cp*2La(2-AlMe3-OC4H7)。
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