Synthesis and reactivity of phosphine-stabilized catena-antimony polycations.

Saurabh S. Chitnis, Neil Burford, Jan J. Weigand, Roland. Fischer

Research output: Contribution to conferencePoster


Recently, it has been shown that reactions of trialkylphosphines with FSbOTf2 (OTf = OSO2CF3) yield cyclic tetrastibino-tetraphosphonium cations: cyclo-[R3PSb]44+ (1 4+).[1] The reactivity of this extremely rare class of catena-antimony cations towards a variety of substrates will be described. By comparison, the analogous reaction of a triarylphosphine, Ph3P, with FSbOTf2 yields a fused bicyclic tetracation (2 4+), featuring a hexastibino-tetraphosphonium framework. Attempts to prepd. chlorine functionalized derivs. via reactions of chlorophosphines with FSbOTf2 proceed via Cl/F exhange to give the first examples of phosphino-fluorophosphonium cations, [R2P-PR2F]+ (3 +). Collectively, the results highlight a rich and varied redox chem. that is accessible within the coordination sphere of a highly electrophilic antimony center.[1] Chitnis, Burford, et. al., Angew. Chem. Int. Ed., 2013, 52, 4863. [on SciFinder(R)]
Original languageGerman
Publication statusPublished - 2014

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