Related Experiment Video
Updated: Jun 17, 2026

Facile Preparation of 4-Substituted Quinazoline Derivatives
Published on: February 15, 2016
Thermal decomposition of 3,4-bis(4'-aminofurazano-3') furoxan
Wei Zheng1, Jiangning Wang, Xiaoning Ren
1Xi'an Modern Chemistry Research Institute, ZhangBa East Road No 168, Yan Ta District, Xi'an, Shanxi 710065, PR China. zhei_wei035991@yahoo.com.cn
Abstract:
The thermal decomposition of 3,4-bis(4'-aminofurazano-3') furoxan (BAFF) was studied by DSC, TG, the combination technique of in situ thermolysis cell with rapid-scan Fourier transform infrared spectroscopy (thermolysis/RSFT-IR) and the fast thermolysis probe with rapid-scan Fourier transform infrared spectroscopy (fast thermolysis/RSFT-IR). The result shows that the melting point of BAFF is 168.4 degrees C, the peak temperatures of the two exothermic peaks are respectively 260.4 degrees C and 338.8 degrees C on DSC curve. The apparent activation energy E(a) and the pre-exponential factor A are respectively 122.21 kJ mol(-1) and 10(9.89)s(-1) for major exothermic decomposition process of BAFF. The kinetic equation of major exothermic decomposition for BAFF is dalpha/dt=10(10.07)exp(-1.46993 x 10(4)/T)(1-alpha) [-ln(1-alpha)](1/3). The thermal decomposition gaseous products of BAFF consist of CO(2), NO(2), N(2)O and NO. The BAFF is shown by IR spectroscopy to convert to ammonium dicyanamide (NH(4)[N(CN)(2)]), cyclic azine residues (melamine or melamine-like).
Related Concept Videos
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Overview
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism
Diazonium Group Substitution: –OH and –H
2° Amines to N-Nitrosamines: Reaction with NaNO2
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

