Synthesis and characterization of some unique heterocyclic derivatives containing aluminium(III) atoms in different co-ordination states. I. Reactions of bis(β-diketonato)-aluminium(III)-di-μ-isopropoxo-di-isopropoxoaluminium(III) with 2-pyridylmethanol

Reactions of bis(β-diketonato)aluminium(III)-di-μ-isopropoxo-di-isopropoxoaluminium(III), [(CH3COCHCOR)2Al-(μ-OPr-i)2Al(OPr-i)2] with 2-pyridylmethanol, (C5H4N-2-CH2OH) in 1:1 and 1:2 molar ratios in refluxing anhydrous benzene resulted in the synthesis of [(CH3COCHCOR)2Al (μ-OPr-i)2Al(OCH2-2-C5H4N)(OPr-i)] [where R=CH3 (1), -OC2-H5 (3), and -C6H5 (5)] and [(CH3COCHCOR)2Al (μ-OPr-i)2Al (OCH2-2-C5H4N)2] [where R=CH3 (2), -OC2H5 (4), and -C6H5 (6)], respectively. All of these compounds are sharp melting solids and are soluble in a variety of organic solvents (e.g., benzene, chloroform and dimethyl sulfoxide) except [(CH3COCHCOOC2H5)2Al(μ-OPr-i)2 Al(OCH2-2-C5H4N)2], which is insoluble in benzene but soluble in chloroform and dimethylsulfoxide. All of these derivatives show a dinuclear structure in benzene. All of the above derivatives have been characterized by elemental analyses, molecular weight determinations, IR and NMR (1H, 13C and 27Al) and FAB mass spectral studies