| abstract |
The invention relates to water-soluble transition metal complexes of the general formula (I), in which the rests R<1> to R<4> are linear or branched C2-C28 alkyl substituted by at least one polar functional group which is ionic or has a protonic action and based on elements of groups IVA to VIA of the periodic table, C3-C14 cycloalkyl or alkyl aryl with between 1 and 28 C-atoms in the alkyl part and between 6 and 15 C-atoms in the aryl part. |