chemically bonded to the polymer rather than an additive application_number US 60531784 A description the synthesis and characterization of the series of vinyloxy chlorcyclotriphosphazenes n 3 p 3 cl 6 n och u2550 ch 2 n n 1 6 is of interest in terms of exploring the substitution pathway of oxygen based nucleophiles with cyclophosphazenes these materials are also new organofunctional phosphazenes which can serve as precursors to new monomeric and polymeric phosphazenes derivatives for experimental purposes the following was performed hexachlorocyclotriphosphazene n 3 p 3 cl 6 ethyl corp was recrystallized from petroleum ether to a constant melting point of 113 u00b0 c n butyllithium 1 6m solution in hexane was obtained from aldrich tetrahydrofuran thf aldrich was distilled from sodium benzophenone ketyl petroleum ether bp 35 u00b0 55 u00b0 c benzene and ethyl acetate fisher were distilled by standard procedures nmr spectra in cdcl 3 were recorded on a brucker wm 250 spectrometer operating at 250 1 mhz 1 h 62 9 mhz 13 c and 101 2 mhz 31 p tetramethylsilane me 4 si was used as internal reference for 1 h and 13 c nmr measurements for 31 p nmr 85 h 3 po 4 was used as an external standard chemical shifts upfield of the reference are assigned a negative sign 13 c and 31 p nmr spectra were recorded under conditions of broad band coupling infrared ir spectra were obtained as their thin films nacl disks on a beckman ir 20a spectrometer mass spectra were recorded on.