Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 141, Issue 45, Pages 18009-18012Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b10628
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- FCI
- DFG
- Foundation of German Business (sdw)
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Tetracoordinate aluminum(III) anions are generally tetrahedral and non-Lewis acidic. Herein, we describe the first planar tetracoordinate aluminum anion. The anion is isolated in its free form, representing a new anti-van't Hoff/Le Bel case. Despite its negative charge, it remains Lewis acidic and permits the formation of various unique adducts, e.g., a dianionic p-block metal hydride. Turning an inert spectator anion into a Lewis acid by planarization verifies theoretical predictions made 40 years ago, ultimately connects anti-van't Hoff/Le Bel structure with reactivity, and pushes further the field of geometrically enhanced p-block element reactivity.
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