New organosiloxanes based on 1-vinyl-2-perfluoroalkoxy-2,3,3-trifluorocyclobutanes

摘要

A new method for the synthesis of polyfluorinated compounds,viz.,chlorosilanes with 2-perfluoroalkoxy-2,3,3-trifluorocyclobutane substituents containing different numbers of tetrafluoro(ethylene oxide) (CF_2CF_2O)_n units (n = 3-6),was developed.The structures of siloxanes formed by the hydrolysis of these chlorosilanes were studied: the hydrolysis of monochlorosilanes affords disiloxanes and that of dichlorosilanes produces cyclotrisiloxanes,cyclotetrasiloxanes,and cyclic (the number of siloxane units >4) and linear polysiloxanes.