Preparation and characterization of chromophor group containing cyclotriphosphazenes: I imino chromophor carrying some cyclotriphosphazenes

Abstract

Some new substituted cyclotriphosphazenes were prepared by the reaction of hexachlorocyclotriphophazene and 4-hydroxy or 4'-hydroxy Schiff bases as 4'-hydroxybenzylideneaniline, 4'-hydroxy-4-chlorobenzylideneaniline, 4'-hydroxy-2-chlorobenzylidenaniline, 4'-hydroxy furfurylidenaniline, 4-hydroxybenzylidene-2'-methylaniline, 4-hydroxybenzylidene-2',6' dimethylaniline, 4-hydroxybenzylidene-2'-chloroaniline, 4-hydroxybenzylidenr4'-tert-butylaniline, 4'-hydroxybenzylidene-3,4-15-Crown-5-aniline. The structure of compounds with a general formula [NP(OC6H4CH=N-Ar)(2)](3) or [NP(OC6H4N=CH-Ar)(2)](3), was determined by IR, UV, H-1-NMR and elemental analysis. IR spectra of all compounds showed four characteristic bands located at 1633-1601 cm(-1) 1242-1150 cm(-1) 1278-1261 cm(-1) and 958-943 cm(1), respectively, corresponding to CH=N, P=N, P-N-P (asymmetric) and P-N-P (symmetric) vibrations. Characteristic UV bands,named as Band I, Band II, Band III and Band IV located at 346-308nm, 294-271nm, 262-216nm and 240-210nm respectively, are due to electronic transitions. The H-1-NMR spectra of 4-hydroxyfurfurylidene and the phosphazene derivative shows cis-trans izomerization below 305 degrees K and 295 degrees K.