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Dihydrogen Activation by Lithium- and Sodium-Aluminyls

OAI: oai:purehost.bath.ac.uk:publications/3a65fd54-3413-4b20-8db7-f721a32f66de • DOI: https://doi.org/10.1002/anie.202108934
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Abstract

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.