Quinone Complexes of Aluminum: Synthesis and Structures

摘要

Reactions of aluminum metal with 3,6-di-tert-butyl-o-benzoquinone (3,6-Q) in various solvents gave aluminum tris-o-semiquinolate and catecholate. The metal catecholate underwent partial hydrolysis in the presence of water. The dimeric complex [(Cat)Al(OH)Bipy]2 x 4C2H4Cl2 (Cat is the 3,6-Q dianion and Bipy is 2,2-bipyridyne) with bridging OH groups was isolated and characterized by X-ray diffraction. A reaction of aluminum with o-quinone in the presence of molecular iodine yielded the dimeric catecholate iodide [(Cat)2Al(Et2o)2]Ali2. The structure of the latter was confirmed by X-ray diffraction. An aluminum catecho-lato-o-semiquinolate complex was obtained by an exchange reaction between [(Cat)2Al(Et2o)2]AlI2 and thallium o-semiquinolate.