Abstract

A representative of the stable alumoles with a chlorine substituent at the aluminum atom was synthesized by the coupling of a cyclobutadiene dianion derivative and aluminum trichloride. The structure of alumole was established by X-ray crystallography, which showed that alumole exists as a monomer. The aluminum atom is tetracoordinated with the fourth coordination site occupied by a thf molecule, which reduces the intrinsically high Lewis acidity of the aluminum center, thus stabilizing the alumole molecule.

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