SYNTHESIS AND CHARACTERIZATION OF SOME UNIQUE HETEROCYCLIC-DERIVATIVES CONTAINING ALUMINUM(III) ATOMS IN DIFFERENT COORDINATION STATES .4. REACTION OF BIS(BETA-DIKETONATO) ALUMINUM (III)-DI-MU-ISOPROPOXO-DI-ISOPROPOXO ALUMINUM(III) WITH 8-HYDROXYQUINOLINE

Reactions of tonato)aluminium(III)-di-mu-isoproxo-di-isopropoxo alumin ium(III), [(CH3COCHCOR)(2)Al(mu-OPri)(2)Al(OPri)(2)] with 8-hydroxyqui noline, C9H6NOH in 1:1 and 1:2 molar ratios, have resulted in the synt hesis of [(CH3COCHCOR)(2)Al(mu-OPri)(2)Al(ONC9H6)(OPri)] and [(CH3COCH COR)(2)Al(mu-OPri)(2)Al(ONC9H6)(2)], respectively. These are soluble i n a variety of organic solvents (e.g. benzene, chloroform and dimethyl sulfoxide), except [(CH3COCHCOCH3)(2)Al(mu-OPri)(2)Al(ONC9H6)(2)] and [(CH3COCHCOOC2H5)(2)Al(mu-Pr-i)(2)Al(ONC9H6)(2)], which are insoluble in benzene but soluble in chloroform and dimethylsulfoxide. These deri vatives show dinuclear behaviour in chloroform. Plausible structures h ave been proposed on the basis of elemental analyses, molecular weight measurements, IR and NMR (H-1, C-13 and Al-27) spectral studies. Al-2 7 NMR spectra show the presence of six and four/five coordinated alumi nium sites. (C) 1997 Elsevier Science Ltd.