New method for nucleophilic substitution on hexachlorocyclotriphosphazene by allylamine using an algerian proton exchanged montmorillonite clay (Maghnite-H+) as a green solid catalyst

Abstract

Nucleophilic substitution on hexachlorocyclotriphosphazene (HCCTP) with allylamine in order to give hexa(allylamino)cyclotriphosphazene (HACTP) is performed for the first time under mild conditions by using diethylether as solvent to replace benzene due to its toxicity. The reaction time is reduced to half and also performed at room temperature but especially in the presence of an eco-catalyst called Magh-nite-H+. This catalyst has a significant role in the industrial scale. In fact, the use of Maghnite is pre-ferred for its many advantages: a very low purchase price compared to other catalysts, the easy re-moval of the reaction mixture. Then, Maghnite-H+ is became an excellent catalyst for many chemical reactions. The structure of HACTP synthesized in the presence of Maghnite-H+ to 5% by weight is con-firmed by 1H-NMR, 13C-NMR, 31P-NMR (Nuclear magnetic resonance) and FTIR (Fourier Transform Infrared spectroscopy). MALDI-TOF (Matrix-Assisted Laser Desorption/Ionisation-time-of-flight mass spectrometry) is used to establish the molecular weight of HACTP which is 471 g/mol. DSC (Differential Scanning Calorimetry) and TGA (Thermogravimetric Analysis) show that HACTP is a crystalline product with a melting point of 88 °C. It is reactive after melting but is degraded from 230 °C.