Organoselenium derivatives of metal carbonyls. Part II. Dimeric and monomeric derivatives of iron carbonyl

Abstract

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(R_F)(R_F= 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.