In the present work, TDSC of 1Htri, 1Htri-CH3 and 1Htri-NH2 were determined by using SC-DSC and Molecular orbital calculations (MO) was used to clarify thermal decomposition mechanism and stability criteria of pathway of 1Htri, 1Htri-CH3 and 1Htri-NH2 were d.TDSC of 1Htri, 1Htri-CH3 and 1Htri-NH2 were determined from the lower ΔEa of thermal decomposition pathway model as proton transfer combine with cleavage bond. The determined TDSC were 297 ºC of 1Htri, 114 ºC of 1Hti-CH3 and 289 ºC of 1Htri-NH2.There results were corresponded with the measured TDSC as were 338 ºC of 1Htri, 172 ºC of 1Hti-CH3 and 293 ºC of 1Htri-NH2, respectively.The results reveal that our approach thermal decomposition pathway model as combination of proton transfer and cleavage bonds of 1Htri, 1Htri-CH3 and 1Htri-NH2 cab be possible to expand and control the application of these compounds.

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