prov:value
| - The present invention also relates to an iodine-doped complex or a mixture thereof with iodine which has the formula II ##STR3## in which M is a divalent metal atom belonging to the group consisting of Fe, Co, Ni, Cu, Zn, Pd and Pt, R1 and R2 independently of one another are a hydrogen atom or alkyl, cycloalkyl, aryl, aralkyl. alkaralkyl or acyl each of which is unsubstituted or substituted, R3, R
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