Abstract
AbstractHerein, we report the synthesis and isolation of Si(IV) dications stabilized by a bidentate N‐heterocyclic carbene‐phosphinidene (NHCP). Treatment of the bis(NHCP) with Si(IV) bis(triflate) R2Si(OTf)2 (with R=H, Ph) resulted in the instant formation of Si(IV) dicationic complexes [2 a] and [2 b] featuring a tetracoordinated silicon centre. The dications show expected high Lewis acidity. The bis(NHCP)‐stabilized parent silyl dication 2a (SiH22+) presents the first isolable example of a parent SiH2 dication. In addition, dication [2 a] is able to react with diphenylketene by insertion into the Si−P bond.
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