To date, aluminyl anions have been exclusively isolated as their potassium salts. We report herein the synthesis of the lithium and sodium aluminyls, M₂[Al(NON^Dipp)]₂ (M=Li, Na. NON^Dipp=[O(SiMe₂NDipp)₂]²⁻; Dipp=2,6-iPr₂C₆H₃). Both compounds crystallize from non-coordinating solvent as “slipped” contacted dimeric pairs with strong M⋅⋅⋅π(aryl) interactions. Isolation from Et₂O solution affords the monomeric ion pairs (NON^Dipp)Al-M(Et₂O)₂, which contain discrete Al−Li and Al−Na bonds. The ability of the full series of Li, Na and K aluminyls to activate dihydrogen is reported.

中文翻译：

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铝基锂和铝基钠的二氢活化

迄今为止，铝基阴离子仅以其钾盐的形式被分离出来。我们在此报告了锂和钠铝的合成，M ₂ [Al(NON ^Dipp )] ₂ ( M =Li, Na. NON ^Dipp =[O(SiMe ₂ NDipp) ₂ ] ²⁻ ; Dipp=2,6- i Pr ₂ C ₆ H ₃ )。两种化合物都从非配位溶剂中结晶为具有强M ⋅⋅⋅π(芳基) 相互作用的“滑动”接触二聚体对。从 Et ₂ O 溶液中分离得到单体离子对 (NON ^Dipp )Al-M (Et ₂ O) ₂，包含离散的Al-Li和Al-Na键。报道了全系列的 Li、Na 和 K 铝基活化二氢的能力。