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Poller, Maximilian J.; Burford, Neil; Karaghiosoff, Konstantin (2018): Reversible Oxidative Se-Se Coupling of Phosphine Selenides by Ph3Sb(OTf)(2). In: Chemistry - A European Journal, Vol. 24, No. 1: pp. 85-88
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Salts of diphosphoniumdiselenide dications ([R3PSeSePR3][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 [Ph3SbL2][OTf](2) (L=Me3PSe, iPr(3)PSe), which is also formed in the reaction of [R3PSeSePR3][OTf](2) with Ph3Sb. The observations indicate that the reductive elimination of [R3PSeSePR3](2+) from [Ph3Sb(SePR3)(2)](2+) is reversible through the oxidative addition of [R3PSeSePR3](2+) to Ph3Sb.