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

The reaction of 2,4-dimethyl-2,4-pentanediol with the mixture of dimethylaluminium 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, Al-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 dimethylaluminium chloride at 2:3 molar ratio of reagents led to the formation of the crystalline unseparable mixture of complexes with the general formula MenCl5-nAl3[OC(CH3)(2)CH2C(CH3)(2)O](2) [where n=0-4] (2). The crystal structure of the product 2 has been determined by X-ray diffraction study.