Process for the preparation of pure magnesium alkoxides

摘要

Production of metal-free, alkoxide-pure alkaline earth alkoxides involves use of an excess of an alcohol to effect alcoholytic alkoxide group exchange in solutions of optionally mixed alkoxides having shorter alkyl chains than the final product, the optionally mixed alkoxides being at least proportionately dissolved during the reaction. Production of metal-free, alkoxide-pure alkaline earth alkoxides of formula (I) involves alcoholysis of a solution of an optionally mixed alkoxide of formula (II) with an excess of an alcohol of formula (III), compound (II) being at least proportionately dissolved during the reaction. M(OR 1>) 2(I) M(OR 2>) x(OR 3>) y(OR 4>) z(II) HOR 1>(III) M : main Group II element; R 1>linear or cyclic 2-20C alkyl in (I) but is different from R 2>- R 4>in (II) in having at least one more carbon atom in the alkyl chain than the longest chain in R 2>- R 4>; R 2>- R 4>1-4C alkyl; and x, y and z : 0-2, with x + y + z = 2.