Abstract
The addition of 4-methylpyridine to Me 2Al[OC(Me)C 6H 4-2-O] produced the relatively stable five-coordinate Lewis acid–base adduct Me 2Al[OC(Me)C 6H 4-2-O]·( γ-picoline). The resulting compound has been characterized by 1H and 27Al NMR spectroscopy and cryoscopic molecular weight measurements and the molecular structure has been confirmed by X-ray crystallography. X-ray structure analysis of this simple five-coordinate complex reveals that the trans-influence of axial substituents is a significant factor controlling the structure and stability of five-coordinate aluminum compounds.
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