The present invention relates to a process for the isomerization of precursor allyl alcohols of the formula (I) to product allyl alcohols of the formula (II) ##STR1##

where R1 to R5 are hydrogen or a mono- or polyunsaturated or saturated C1-C12-alkyl radical, which may be substituted, in both directions of the equilibrium, wherein the reaction takes place in the presence of an oxoperoxotungsten(VI) complex of the formula (III), ##STR2##

where

    • L1, L2 in each case independently of one another are water or a free coordination site, or are optionally a ligand chosen from the group of aminoalcohols, aminophenols, aminocarboxylic acids or mixtures thereof or mixtures of amines with alcohols, phenols or carboxylic acids,
    • m is the number 1 or 2
    • n is a number from 1 to 6
    • p is a number from 1 to 6, where in the case of p1 a di- or polynuclear complex is formed, and also to novel oxoperoxotungsten(VI) complexes and to the use thereof.
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