Reactions of alkylaluminium chlorides with diols. Crystal structure of Cl5Al3[OC(CH3)(2)CH2C(CH3)(2)O](2)

The reaction of 2,4-dimethyl-2,4-pentanediol with the mixture of dimethylal uminium chloride and methylaluminium dichloride at 2:0.75:2.25 molar ratio of reactants proceeded yielding the complex Cl5Al3[OC(CH3)(2)CH2C(CH3)(2)O] (2) (1). The pure complex was isolated and characterised by means of H-1, A l-27 NMR spectroscopy, molecular weight measurements and elemental analysis . The crystal structure of 1 was determined by X-ray diffraction analysis. On the other hand the reaction of 2,4-dimethyl-2,4-pentanediol with dimethy laluminium chloride at 2:3 molar ratio of reagents led to the formation of the crystalline unseparable mixture of complexes with the general formula M enCl5-nAl3[OC(CH3)(2)CH2C(CH3)(2)O](2) [where n=0-4] (2). The crystal struc ture of the product 2 has been determined by X-ray diffraction study.