Functionalization of a cyclo-P5 Ligand by Main-Group Element Nucleophiles

摘要

Unprecedented functionalized products with an η~4-P5 ring are obtained by the reaction of [Cp*Fe(η~5-P5)] (1; Cp* = η~5-C5Me5) with different nucleophiles. With LiCH2SiMe3 and LiNMe2, the monoanionic products [Cp*Fe(η~4-PsCH2SiMe3)]~- and [Cp*Fe(η~4-P5NMe2)]-, respectively, are formed. The reaction of 1 with NaNH2 leads to the formation of the trianionic compound [{Cp*Fe(η~4-P5)}2N]~(3-), whereas the reaction with LiPH2 yields [Cp*Fe(η~4-P5PH2)]~- as the main product, with {[Cp*Fe(η~4-P5)]2PH}~(2-) as a byproduct. The calculated energy profile of the reactions provides a rationale for the formation of the different products.