The nucleophilic substitution reaction of hexachlorocyclotriphosphazene (N(3)P(l)3l(I)6, rinmer) (1) with -4hydroxy-l-naphthaldehyde (2) has been investigated for the first time4d'-Oxy1l'-naphthaldehyde substituted mon- o(3), bis- (4), and tris- (5) cyclotriphosphazenes were obtained from the nucleophilic substitution of compound 1 with 2inm a : 2 molar ratioinm the presence of s(S)2CO3inm acetone at reflu.x The pentakis-(6) and hexakis-substituted (7) cyclotriphosphazenes were prepared from the reaction of 1 with 2inm a : 7 molar ratio using (K)2C(O)3 as a proton abstractorinm tetrahydrofuran at room temperatur.e The structures of the new compounds (3-7) were determined by elemental analysis, FT-IR, and mass and nuclear magnetic resonance (H-1 and (31) P) spectroscopies.