Dodecarbonyltri-iron reacts with dimethyl and diethyl diselenides and with the corresponding bisperfluoroalkyl diselenides to afford the respective selenoalkyl and perfluoroalkyl iron tricarbonyl dimers, [Fe(CO)3Se(R)]2(R = CH3, C2H5, CF3, or C2F5), while the i-C3H7 derivative is obtained by the reaction of the same iron carbonyl with perfluoroisopropylselenol. The two compounds of the type [(C5H5)Fe(CO)Se(R)]2(R = C2H5 or n-C3H7) resulted from the reaction between the cyclopentadienyl iron dicarbonyl dimer, [(C5H5)Fe(CO)2]2, and the appropriate dialkyl diselenide.The only monomeric derivatives in this group of compounds, (C5H5)Fe(CO)2Se(RF)(RF= CF3, C2F5, or C3F7), were obtained by the reaction of cyclopentadienyl iron dicarbonyl dimer and the respective bisperfluoroalkyl diselenide.The mechanism of the above reactions is discussed and the properties of the new compounds are described.
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