三甲基铽与三甲基铝和三甲基镓的反应活性不同：给体稳定的二甲基铽的合成。

Distinct Reactivity of Trimethylytterbium toward AlMe and GaMe : Synthesis of Donor-Stabilized Dimethylytterbium.

机构信息

Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany.

出版信息

Chemistry. 2023 Apr 21;29(23):e202203824. doi: 10.1002/chem.202203824. Epub 2023 Mar 14.

DOI:10.1002/chem.202203824

PMID:36688627

Abstract

Me TACN (1,4,7-trimethyl-1,4,7-triazacyclononane)-stabilized trimethylytterbium was obtained via a salt-metathesis protocol employing [(Me TACN)YbCl ] and methyllithium. Complex [(Me TACN)YbMe ] seems not to engage in redox chemistry with potassium graphite and is thermally quite stable in the solid state. Treatment of trivalent [(Me TACN)YbMe ] with 3 equiv. of AlMe afforded divalent tetramethylaluminate complex [(Me TACN)Yb(AlMe ) ]. The reaction of [(Me TACN)YbMe ] with GaMe in THF gave trivalent ion pair [(Me TACN)YbMe (thf)][GaMe ], which is susceptible to reduction with KC . The thermally very labile divalent [(Me TACN)YbMe(μ-Me)] is the first discrete donor adduct of a divalent dimethyl rare-earth-metal complex.

摘要

采用盐交换法，利用[(MeTACN)YbCl]和甲基锂合成了 MeTACN（1,4,7-三甲基-1,4,7-三氮杂环壬烷）稳定的三甲基 ytterbium。复合物[(MeTACN)YbMe]似乎不会与石墨钾发生氧化还原反应，在固态下具有相当高的热稳定性。用 3 当量的 AlMe 处理三价[(MeTACN)YbMe]，得到四甲基铝酸盐复合物[(MeTACN)Yb(AlMe4)]。[(MeTACN)YbMe]与 GaMe 在 THF 中的反应得到三价离子对[(MeTACN)YbMe(thf)][GaMe]，它易被 KC 还原。热稳定性非常差的二价[(MeTACN)YbMe(μ-Me)]是第一个二价镧系金属配合物的离散供体加合物。