The First Organoaluminum Derivative of a Hydroxy Carboxylic Acid. Molecular Structure of the Tetranuclear [Et2Al]4[(μ-O2C)C6H4-2-μ-O]2 Adduct
Janusz Lewiński , Janusz Zachara , Iwona Justyniak
AbstractThe reaction of triethylaluminum with salicylic acid in a 2:1 molar ratio results in the formation of the novel tetranuclear diethylaluminum aryloxide carboxylate adduct [Et2Al]4[(?-O2C)C6H4-2-?-O]2 (1). Compound 1 has been characterized by elemental analysis and 1H and 27Al NMR and IR spectroscopy, and its molecular structure has been determined by X-ray crystallography. The molecule is a centrosymmetric cluster with a skeleton framework consisting of three fused heterocycle rings, one 12- and two 6-membered. The two diethylaluminum units symmetrically join the two salicylic acid dianions by the formation of bridges between the aryloxide oxygen atom and one carboxylate oxygen atom of the second ligand. The two other diethylaluminum units are chelated by the aryloxide and second carboxylate oxygen atoms of each ligand. The carboxylate groups display a bidentate coordination mode with syn?anti conformation. The binding mode of the carboxylate and alkoxide ligands to metal centers is also discussed.
|Journal series||Organometallics, ISSN 0276-7333|
|ASJC Classification||; ;|
|Publication indicators||= 30; : 1999 = 1.226; : 2006 = 3.632 (2) - 2007=3.46 (5)|
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