Sandwich type selenotungstate derivates [M-2(Se2W19O67)(H2O)(3)](8-) (M = Co-II or Mn-II) as co-catalyst of tetrabutylammonium bromide for CO2 cycloaddition to epoxides under mild conditions

摘要

Two classic sandwich type selenotungstate derivates polyoxometalate [M-2(Se2W19O67)(H2O)(3)](8-) (M = Co(II )or Mn-II) have been successfully obtained and characterized. The compounds acted as promising co-catalyst of tetrabutylammonium bromide and promoted the conversion of carbon dioxide to a cyclic carbonate under mild reaction conditions.