Synthesis and Characterization of Some Unique Heterocyclic Derivatives Containing Aluminium(III) Atoms in 4- and 6-Co-Ordination States∶ Reaction of Bis(β-Diketonato) Aluminium (III)-DI-μ-Isopropoxo-DI-Isopropoxo Aluminium(III) with Triphenylsilanol and Diphenylsilanediol

Abstract

Reactions of bis ( g -diketonato) aluminium(III)-di- w -isopropoxo-di-isopropoxo-aluminium (III), [CH3COCHCOR)2Al( w -OPri)2Al(OPri) 2], with triphenylsilanol, Ph3SiOH, in 1:1 and 1:2 molar ratios and with diphenylsilanediol, Ph2Si(OH)2, in a 1:1 molar ratio, have resulted in the synthesis of [(CH3COCHCOR)2Al( w -OPri)2Al(OSiPh3)(OPri)], [(CH3COCHCOR)2Al( w -OPri)2Al(OSiPh3)2] and [(CH3COCHCOR)2Al( w -OPri)2Al(OSiPh2O], respectively. These are soluble in a variety of organic solvents ( e.g. , benzene, chloroform and dimethylsulfoxide) and show dinuclear behaviour in chloroform. These derivatives have been characterized by elemental analyses, molecular weight measurements, IR and NMR (1H, 13C and 27Al) studies.