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Updated: Feb 20, 2026

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Published on: December 29, 2016
Reversible Oxidative Se-Se Coupling of Phosphine Selenides by Ph3 Sb(OTf)2
Maximilian J Poller1,2, Neil Burford1, Konstantin Karaghiosoff2
1Department of Chemistry, University of Victoria, Victoria, B.C., V82Y2, Canada.
Abstract:
Salts of diphosphoniumdiselenide dications ([R3 PSeSePR3 ][OTf]2 ) have been isolated from reactions of trialkylphosphine selenides with triphenylantimony bistriflate. The redox process is speculated to proceed via a cationic coordination complex [Ph3 SbL2 ][OTf]2 (L=Me3 PSe, iPr3 PSe), which is also formed in the reaction of [R3 PSeSePR3 ][OTf]2 with Ph3 Sb. The observations indicate that the reductive elimination of [R3 PSeSePR3 ]2+ from [Ph3 Sb(SePR3 )2 ]2+ is reversible through the oxidative addition of [R3 PSeSePR3 ]2+ to Ph3 Sb.
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