Coordination and oxidation of phosphine selenides with iodine: from cation pairs [(R3PSe)2I+]2 to (iodoseleno)phosphonium ions [R3PSeI]+ existing as guests in polyiodide matrices

Authors:
  • ESEmma Seppälä
    Emma Seppälä
  • FRFrank Ruthe
    Frank Ruthe
  • JJJörg Jeske
    Jörg Jeske
  • WMWolf-W. du Mont
    Wolf-W. du Mont
  • PJPeter G. Jones
    Peter G. Jones
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Abstract
An X-ray crystallographic study of adducts of trialkylphosphine selenides with >1 equivalent of diiodine reveals that solid But 3PSeI3 consists of cation pairs [(But 3PSe)2I+]2 intercalated between I5 – layers and that solid R2R′PSeI7 (R = But or Pri, R′ = Pri) contains [R2R′P–Se–I]+ cations with weak secondary I‥I interactions to polyiodide networks.