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)₂ Al(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.