Abstract

Abstract The organoiron selenides [(C5H5)Fe(CO)2]2(μ-Se) (I), [(t-BuC5H4)Fe(CO)2]2(μ-Se2) (II), and [(1,3-t-Bu2C5H3)Fe(CO)2]2(μ-Se2) (III) were prepared from the reaction of the organoiron dimers [(C5H5)Fe(CO)2]2, [(t-BuC5H4)Fe(CO)2]2 and [(1,3-t-Bu2C5H3)Fe(CO)2]2 with elemental selenium. The above selenides (I), (II) and (III) react with acid chlorides, RCOCl to give the Se-bonded monoselenocarboxylate derivatives [Cp′Fe(CO)2SeCOR] (Cp′ = C5H5, t-BuC5H4, 1,3-t-Bu2C5H3; R = 4-;O2NC6H4, 3,5-(O2N)2C6H3). The presence of tert-butyl substituents on the cyclopentadienyl ring introduces significant changes in the properties of these systems relative to the unsubstituted cyclopentadienyl analogues.

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