Showing 4 results for Tetrazole
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Volume 9, Issue 2 (10-2014)
Abstract
Tetrazoles and their derivatives are insensitive energetic molecules that can be used in the compounding of the high energy material. Herein, two types of bis hyroxyethyl tetrazole compounds have been synthesized using bisnitrile and sodium azide and via consequent alkylation of the reaction product .The structure of all products have been confirmed by 1HNMR, MASS spectroscopy and elemental analysis. Also, for better interpretation of the 1HNMR spectra of bishydroxy ethyl tetrazole, the most stable conformation of 2-(5-methyl-2H-tetrazol-2-yl)ethan-1-ol (as a model molecule) have been investigated. The results of conformational analysis have indicated that the most stable conformation is gouch one. So, under basis of the 1HNMR and conformational analysis, the presence of an intramolecular hydrogen bond between –OH group and the 2-N atom of tetrazole ring in hydroxyl ethyl tetrazole componds was confirmed.
, ,
Volume 9, Issue 3 (3-2014)
Abstract
Tetrazoles are cyclic aromatic compounds that include four nitrogens and one carbon atom in one ring .These compounds have many applications in civil and military industries. These compounds can produce great amount of N2 after burning and for this reason they have a little environmental contamination and are considered as green explosive materials. Introduction of tetrazoles in polymeric chain structure can enhance the energetic properties of polymers. So far various methods were reported for the synthesis of polytetrazoles .In the most of them, tetrazoles linked to the main chain as suspension branches. By using the functionalized tetrazole rings as monomer, we can insert these rings into the main chain structure. By controlling and improving the mechanical properties of polytetrazoles, these polymers due to their special impulse and good termal stability, have the capability to substitute with some high energetic polymers such as GAP. In this paper, the synthesis of various tetrazole polymeric systems are investigated.
Narges Zohari, Iman Ranjbarbajestani,
Volume 14, Issue 2 (3-2019)
Abstract
Promote chemical technologies is an innovation that reduce or eliminate use or production of hazardous materials in the design, manufacture and use of chemical products. According to this law, reduce pollution at source is fundamentally different and more desirable than waste management and pollution control. Nowadays, this new approach known as green chemistry, which is: The design of chemical products and processes that reduce or destroy use and generate substances harmful to human health and the environment. In this article, chemical compounds containing the new tetrazoles includes N- oxide group, which belongs to high energetic compounds, has been discussed and compared with conventional explosives. In this comparison, it is seen that some -N-oxide compounds have better properties and performance compared to conventional explosives. So they could be suitable alternatives for propellants and explosives.
Mohammad Eghdamtalab, S.ghorban Hosseini, Shahram Ghanbari, Saeed Tavangar, Keyvan Moeini,
Volume 20, Issue 1 (1-2026)
Abstract
Ammonium perchlorate (AP), a conventional solid oxidizer in energetic compositions, undergoes multi-stage thermal decomposition across a wide temperature range, making it an ideal benchmark for evaluating solid-phase catalysts. In recent years, traditional metal oxide catalysts have been increasingly replaced by novel energetic catalysts. These next-generation catalysts, designed as metal-organic complexes incorporating energetic ligands and transition metals, offer the dual advantage of serving as both fuel and catalyst in energetic formulations. In this study, the energetic catalyst tris(aminoguanidinium) tris(5,5′-methylenebis(tetrazolato))cobalt(III) was synthesized, characterized, and subsequently evaluated. A composite consisting of 75% ammonium perchlorate (AP) and 25% catalyst was analyzed using thermogravimetric analysis and differential scanning calorimetry (TG-DSC). The results for the catalyzed AP showed a reduction in decomposition temperature from 415°C to 320°C, a decrease in activation energy from 223.5 kJ·mol⁻¹ to 189.8 kJ·mol⁻¹, and an increase in decomposition enthalpy from 888 J·g⁻¹ to 3077 J·g⁻¹. These improvements are attributed to the effective catalytic activity of the complex.
