Investigation the role of 2-amino pyridine and ET3N in the substitution and hydrolysis mechanism of the P3N3Cl6 by 31P-NMR

Abstract

1,3,3,5,5, penta chloro-1- mono (2-amido pyridine ) cyclo tri phosphazen and 1,3,5 tri chloro1,3,5 tri (2-amidopyridine)cyclo tri phosphazen were synthesized by the reaction of trimer with 2-aminopyridine in mole ratio1:1 and 1:3 in aceton by -800C in Liquid nitrogen bath. The hydrolysis of trimer by the effect of lone pair electron in the nitrogen atom of the 2- amidopyridine was studied by the FTIR and 1H , 13C , 31P- NMR spectroscopy . Hexachlorocyclotriphosphazene is found to be stable in CDCl3 and C6D6 in presence of water even at elevates temp. 550 c for CDCl3 and 650 c forC6D6 duo to time factor it could be stayed stable for more than two week. Only upon addition of ET3N than hydrolysis is observed, the hydrolysis of trimer with the triethylamine discussed by 31P-NMR spectroscopy.