Dihydrogen Activation by Lithium- and Sodium-Aluminyls

Matthew Evans, Mathew Anker, Claire McMullin, Sam Neale, Martyn Coles

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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(NONDipp)]2 (M=Li, Na. NONDipp=[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 (NONDipp)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.
Original languageEnglish
JournalAngewandte Chemie-International Edition
Early online date16 Aug 2021
Publication statusE-pub ahead of print - 16 Aug 2021

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