The reaction of hexachlorocyclotriphosphazene with two naphthyl. Soft nucleophiles like amines, however, do not affect the configuration at the phosphorus centers and allow equivalents of the chelating diols 2,2Ј-dioxybiphenyl and 2Ј,2ЈЈ-dioxy-1Ј,1ЈЈ-bi-2-naphthyl was investigated. Although the synthesis of meso-[(R,S)-(O,O) 2 (R 1 RN) 2 P 3 N 3 ] compounds. the bifunctional cyclotriphosphazenes [(O,O) 2 (4-OH-a mixture of different stereoisomers may be expected, only the formation of the meso-compounds [(R,S)-(O,O) 2 Cl 2 P 3 N 3 ] C 4 H 4 O) 2 P 3 N 3 ] and [(R,S)-(O,O) 2 (H 2 N) 2 P 3 N 3 ] were used in polyaddition reactions with hexymethylene di(isocyanate) to is found (O,O stands for the diolate). Interestingly, when the remaining PCl 2 group undergoes reaction with hard give cyclolinea polymers of different stereochemical compositions corresponding to the stereochemistry of the nucleophiles like 4-methoxy phenolate, a change of configuration at one phosphorus center is observed and phosphazene precursor (i.e. either a racemic mixture of homochiral polymer strands, enantiomerically pure racemic mixtures of chiral [(R,R)-(O,O) 2 (RO) 2 P 3 N 3 ] and [(S,S)-(O,O) 2 (RO) 2 P 3 N 3 ] phosphazenes are observed.
polymers, or the meso-form of polymers was obtained). The properties of these polymers are discussed and a mechanism Enantiomerically pure cyclotriphosphazenes were obtaines from either the (R)-or (S)-form of 2Ј,2ЈЈ-dioxy-1Ј,1ЈЈ-bi-2-for the change of stereochemistry is proposed.