PREPARATION OF POLYALKYLVIOLOGEN-POLYANION COMPLEXES AND THEIR APPLICATIONS TO THE DEBROMINATION OF DIPHENYL BROMOMETHANE UNDER HETEROPHASE CONDITION

Several polyelectrolyte complexes were prepared by the reaction of polyalkylviologens [polyethylviologen (PEV2+), polypropylviologen (PPrV2+), and polybutylviologen (PBV2+) ] with polyanions [sodium alginic (ALG), sodium polyacrylate (PAA), or sodium polystyrenesulfonate (PSS) ]. These complexes were used as electron-transfer catalysts (ETC) on the debromination of diphenyl bromomethane (Ph2CHBr) under heterophase condition [ reductant: Na2S2O4, in H2O (liquid)-polyelectrolyte complex (S)-Ph2CHBr in CH2Cl2]. The work showed that these complexes could induce the debromination of Ph2CHBr to afford tetraphenyl ethane, and different polyanions in the complexes also affected the mediating abilities. (C) 1994 John Wiley & Sons, Inc.