Syntheses and characterizations of cyclotriphosphazenes containing a 4-oxy-1-naphthaldehyde group

Authors: HANİFE İBİŞOĞLU, ESRA TANRIVERDİ EÇİK, GÖNÜL YENİLMEZ ÇİFTÇİ

Abstract: The nucleophilic substitution reaction of hexachlorocyclotriphosphazene (N$_{3}$P$_{3}$Cl$_{6}$, trimer) (1) with 4-hydroxy-1-naphthaldehyde (2) has been investigated for the first time. 4$^{{\prime}} $-Oxy-1$^{{\prime}} $-naphthaldehyde substituted mono- (3), bis- (4), and tris- (5) cyclotriphosphazenes were obtained from the nucleophilic substitution of compound 1 with 2 in a 1:2 molar ratio in the presence of Cs$_{2}$CO$_{3}$ in acetone at reflux. The pentakis-(6) and hexakis-substituted (7) cyclotriphosphazenes were prepared from the reaction of 1 with 2 in a 1:7 molar ratio using K$_{2}$CO$_{3}$ as a proton abstractor in tetrahydrofuran at room temperature. The structures of the new compounds (3-7) were determined by elemental analysis, FT-IR, and mass and nuclear magnetic resonance ($^{1}$H and $^{31}$P) spectroscopies.

Keywords: Cyclotriphosphazene, 4-hydroxy-1-naphthaldehyde, nuclear magnetic resonance

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