Complex Formation with Organoaluminum Compounds

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Abstract
From theoretical considerations of the Lewis‐acid character of the organoaluminum compounds AlR3 and AlEt2X and of possible combinations of these acids with Lewis bases‐chiefly anions combined with alkali metal ions – by reactions analogous to neutralizations, as well as on the basis of experimental findings, the compounds AlEt2X and the alkali salts MY can be arranged in the order of their tendency to form complexes, in dependence on the nature of X and Y, respectively. – Numerous displacement reactions, in which a stronger complexing group replaces a weaker one, confirm these series. These reactions have led to the formation of new complex compounds of alkylaluminum with the hitherto unknown alkyls of calcium, strontium, and barium, and also to the preparation of [NEt4][AlEt4] and [SbEt4][AlEt4]. Displacement of ethylsodium from NaAIEt4 with the aid of NaOR – which is readily complexed – in the presence of benzene provides a simple mode of conversion of alkylaluminum into phenylaluminum compounds: equation image

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