Organoboronium-functionalized polystyrenes as a new class of polycations
The facile preparation of organoboronium polymers via spontaneous reaction of bromoborylated polystyrene with 2,2′-bipyridine is reported; these novel polycations represent an interesting alternative to commonly used ammonium-based polycations. The Royal
Well-defined boron-containing polymeric Lewis acids
A general new route to well-defined polymeric Lewis acids via borylation of silylated polymers is reported. Trimethylsilylated polystyrene (PS-Si) of controlled molecular weight and low polydispersity (PDI 3 to give poly(4-dibromoborylstyrene) (PS-B), a novel soluble boron-containing polymeric Lewis acid. PS-B readily reacted with nucleophiles serving as a precursor to a family of new polymers with boron centers of variable Lewis acidity. Reaction of PS-B with Cu(C6F5) gave the highly Lewis acidic polymer poly[4-bis(pentafluorophenyl)borylstyrene], the first polymeric analogue of tris(pentafluorophenyl)borane. Copyright