ELECTROCHEMICALLY INDUCED AROMATIC NUCLEOPHILIC-SUBSTITUTION IN P-DIIODOBENZENE WITH [(ETA(5)-C5H5)FE(CO)(2)](-) AND [(ETA(5)-C5H5)W(CO)(3)](-)-ANIONSстатья
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Аннотация:The reactions of p-diiodobenzene with [(eta(5)-C5H5)Fe(CO)(2)](-) and [(eta(5)-C5H5)W(CO)(3)](-) were studied using a complex of electrochemical techniques (cyclic voltammetry, rotating ring-disk electrode and preparative scale electrolysis). For [(eta(5)-C5H5)Fe(CO)(2)](-) it was shown that aromatic nucleophilic substitution of either one or two iodine atoms in p-diiodobenzene for eta(5)-cyclopentadienylirondicarbonyl can be performed through electrochemical activation of the aryl halide. The ratio of (eta(5)-C5H5)Fe(CO)(2)C6H4I and (eta(5)-C5H5)Fe(CO)(2)C6H4Fe(CO)(2)(eta(5)-C5H5) was shown to depend strongly on the electrolysis conditions: electrode potential, electrolysis duration, etc. The yield of (eta(5)-C5H5)Fe(CO)(2)C6H4Fe(CO)(2)(eta(5)-C5H5) can be considerably increased when (eta(5)-C5H5)Fe(CO)(2)C6H4I is taken as a starting compound. For [(eta(5)-C5H5)W(COI- the main product of the reaction with p-diiodobenzene is (eta(5)-C5H5)W(CO)(3)I.