Thermal Decomposition of Tetraethylammonium Perchlorate
01 Dec 1982-Propellants, Explosives, Pyrotechnics (WILEY‐VCH Verlag GmbH)-Vol. 7, Iss: 6, pp 155-157
TL;DR: The mass spectral data suggest that the salt undergoes thermal decomposition into neutral particles which are then vapourized and ionized as well as oxidized as mentioned in this paper, and the heat of phase transformation is calculated to be 2.5 kcal/mol.
Abstract: Thermal decomposition of tetraethylammonium perchlorate has been studied by thermogravimetry, differential thermal analysis and mass spectrometry. The title compound undergoes crystallographic transformation at 98°C and explodes at 298°C. The heat of phase transformation is calculated to be 2.5 kcal/mol. The mass spectral data suggest that the salt undergoes thermal decomposition into neutral particles which are then vapourized and ionized as well as oxidized.
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TL;DR: The thermolysis of various substituted ammonium salts of nitric and perchloric acids has been reviewed and it has been observed that the proton transfer process do play a major role during thermolyses of these salts.
69 citations
TL;DR: In this article, the authors studied the thermal decomposition of tetraethyl ammonium tetrafluoroborate in an inert atmosphere of pure Helium gas at a sample heating rate of 5 kmin−1 employing a platinum crucible.
Abstract: Thermal decomposition of tetraethyl ammonium tetrafluoroborate has been studied employing simultaneous techniques of TG–DTG–DSC—quadrupole mass spectrometric techniques in an inert atmosphere of pure Helium gas at a sample heating rate of 5 K min−1 employing a platinum crucible. The observed decomposition paths are the most commonly expected Hofmann elimination and substitution reactions paths.
13 citations
Cites result from "Thermal Decomposition of Tetraethyl..."
...Similar observation in respect of thermal decomposition of tetraethylammonium perchlorate by Udupa [29] and by Haskins [30] with respect to the thermal degradation of benzyltrialkylammonium salts, support this argument....
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TL;DR: In this article, a mixture of polyoxotungstovanadate (POTV) and polyacrylic acid-co-acrylamide gel (PAACA) was synthesized and the acid properties were characterized by means of potentiometric titration with n-butylamine.
13 citations
TL;DR: In this article, the thermal decomposition of benzyl-triethyl-ammonium tetrafluoroborate (BTEATFB) employing simultaneous TG-DSC coupled with a quadrupole mass spectrometer is considered.
Abstract: Mechanistic aspects of the thermal decomposition of benzyl-triethyl-ammonium tetrafluoroborate (BTEATFB) employing simultaneous TG-DSC coupled with a quadrupole mass spectrometer are considered in this work The experiments were conducted in an inert atmosphere of helium The decomposition of BTEATFB proceeds through several competing mechanisms While nucleophilic substitution reaction occurs through the formation of a tertiary amine and plays an important role in the initial stages of the decomposition, and the probability of Hoffman elimination also exists
6 citations
Cites background from "Thermal Decomposition of Tetraethyl..."
...The formation of an intermediate amine in the thermal decomposition of quaternary ammonium compounds was reported by Haskins and Mitchell [8], Udupa [16], Nambiar et al....
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...The formation of an intermediate amine in the thermal decomposition of quaternary ammonium compounds was reported by Haskins and Mitchell [8], Udupa [16], Nambiar et al. [17], and Prasad and Krishnamurthy [18]....
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TL;DR: The mass spectral results suggest that guanidinium perchlorate undergoes thermal decomposition into neutral particles which are then vapourized, ionized, and oxidized to give melamine as discussed by the authors.
Abstract: Thermal decomposition of guanidinium perchlorate has been studied by thermogravimetry, differential thermal analysis, mass spectrometry and X-ray diffractometry. The title compound undergoes crystallographic phase transformation at 180°C before melting at 255°C. It decomposes exothermally into gaseous products in the temperature range 275°C–325°C. The mass spectral results suggest that the compound undergoes thermal decomposition into neutral particles which are then vapourized, ionized and oxidized. The fragment cyanamide is found to undergo trimerization to give melamine.
3 citations
References
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01 Jan 1978TL;DR: In this article, the normal modes of vibration are illustrated and corresponding vibrational frequencies are listed for each type, including diatomic, triatomic, fouratomic, five-atomic, six-atomic and seven-atomic types.
Abstract: Inorganic molecules (ions) and ligands are classified into diatomic, triatomic, four-atomic, five-atomic, six-atomic, and seven-atomic types, and their normal modes of vibration are illustrated and the corresponding vibrational frequencies are listed for each type. Molecules of other types are grouped into compounds of boron, carbon, silicon, nitrogen, phosphorus, and sulfur, and the structures and infrared (IR)/Raman spectra of select examples are shown for each group. Group frequency charts including band assignments are shown for phosphorus and sulfur compounds. Other group frequency charts include hydrogen stretching frequencies, halogen stretching frequencies, oxygen stretching and bending frequencies, inorganic ions, and metal complexes containing simple coordinating ligands.
Keywords:
inorganic compounds;
coordination compounds;
diatomic molecules (ligands);
triatomic molecules (ligands);
four-atomic molecules (ligands);
five-atomic molecules (ligands);
six-atomic molecules (ligands);
seven-atomic molecules (ligands);
boron compounds;
carbon compounds;
silicon compounds;
nitrogen compounds;
phosphorus compounds;
sulfur compounds;
group frequency charts
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