SMALL-MOLECULE MODEL PHOSPHAZENES WITH PARASUBSTITUTED PHENOXY SIDE-GROUPS - SYNTHESIS, CRYSTAL-STRUCTURES AND COMPARISONS WITH CORRESPONDING HIGH POLYMERS

A series of new cyclic phosphazenes and a linear short-chain phosphaze ne have been synthesized as models for the preparation of the correspo nding phosphazene high polymers. Several of the high polymers were als o prepared. The small molecule compounds were characterized by a combi nation of P-31 NMR, mass spectrometry and elemental analysis. The crys tal and molecular structures of N3P3(OC(6)H(4)R-4)(6) (R = CH3, OH, OP h or OCH(2)Ph), N4P4(OC(6)H(4)OPh-4)(8) and OP(OC(6)H(4)Bu(t)-4)(2)NP( OC(6)H(4)Bu(t)-4) were investigated by single-crystal X-ray diffractio n techniques. High polymers, [NP(OC(6)H(4)R-4)(2)](n), (R = OPh, OCH(2 )Ph or Bu(t)), [NP(OC(6)H(4)CPh(3)-4)(1.5)Cl-0.5](n), and [NP(OCH(2)C( 6)H(4)OCH(2)Ph-4)(2)](n) were also prepared and their structures confi rmed by a variety of techniques including H-1 and P-31 NMR spectroscop y, elemental analysis and differential scanning calorimetry.