ALUMINUM(III) COMPLEXES WITH USUAL AND UNUSUAL COORDINATION NUMBERS

Some new Schiff base derivatives of aluminium having the general formu la (OPr(i))(3-n)Al[O(NH2)C:NN:C(CH3)R]n (where n=1,2 and 3; R=C4H3O, C 4H3S, C5H4N and C10H7) have been synthesised by the reactions of semic arbazones of the methyl ketones of heterocyclic aromatic compounds wit h aluminium isopropoxide in stoichiometric ratios in refluxing benezen e. The replacement reactions of isopropoxy aluminium (III) derivatives with tert.butanol have also been studied. All these derivatives have been characterised by conductance measurements, elemental analysis and molecular weight determination. Their probable structures have been p roposed on the basis of infrared and H-1 NMR spectral studies.