prov:value
| - In particular, the groups L may each represent a monophosphine PRR'R, R, R' and R each independently representing a C1 -C14 alkyl group which may be substituted with SO3 -, COOH, alkoxy, alkyl-S-, or an aromatic group which may be substituted with at least one substituent chosen in particular from halogen, such as Cl, Br or F, alkyl, CF3 alkoxy, NO2 or SO3 -, it being possible for at least two o
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