Related Experiment Video
Updated: Jan 22, 2026
05:05
Ultrasound Cyclo Plasty in Eyes with Glaucoma
Published on: January 26, 2018
12.7K
Syntheses of Energetic cyclo-Pentazolate Salts
Lili Tian1, Yuangang Xu1, Qiuhan Lin1
1School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
Chemistry, an Asian Journal
|July 10, 2019
Summary
Researchers synthesized novel energetic cyclo-N5- salts using a metathesis reaction. These compounds show promising detonation performance with reduced sensitivity and good thermal stability, advancing high-energy materials research.
Area of Science:
- * Chemistry
- * Materials Science
- * Energetic Materials
Background:
- * The pentazolate anion (cyclo-N5-) is a high-nitrogen content moiety with potential for energetic applications.
- * Synthesis of stable pentazolate salts has been challenging due to the anion's inherent instability.
Purpose of the Study:
- * To develop a new synthetic route for energetic cyclo-N5- salts.
- * To characterize the properties of newly synthesized pentazolate compounds.
Main Methods:
- * Metathesis reaction between barium pentazolate and various sulfates.
- * Characterization using single-crystal X-ray diffraction, IR, NMR (1H and 13C), TGA, DSC, and elemental analysis.
Main Results:
- * Successfully synthesized three energetic cyclo-N5- salts.
- * The salts demonstrated good detonation performance.
- * Exhibited low sensitivities and good thermal stability.
Conclusions:
- * The developed metathesis reaction is an effective method for producing energetic pentazolate salts.
- * This work opens avenues for the discovery of novel high-performance energetic materials containing the pentazolate anion.
Related Concept Videos
04:08Determining the pH of Salt Solutions
47.1K
The pH of a salt solution is determined by its component anions and cations. Salts that contain pH-neutral anions and the hydronium ion-producing cations form a solution with a pH less than 7. For example, in ammonium nitrate (NH4NO3) solution, NO3− ions do not react with water whereas NH4+ ions produce the hydronium ions resulting in the acidic solution. In contrast, salts that contain pH-neutral cations and the hydroxide ion-producing anions form a solution with a pH greater than 7. For...
47.1K
02:02Responses to Salt Stress
14.5K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
14.5K
02:35Energetics of Solution Formation
7.4K
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
7.4K
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
3.6K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...
3.6K
01:14Nucleophilic Aromatic Substitution of Aryldiazonium Salts: Aromatic SN1
2.7K
Treating arylamines with nitrous acid gives aryldiazonium salts that are effective substrates in nucleophilic aromatic substitution reactions. The diazonio group in these salts can be easily displaced by different nucleophiles, yielding a wide variety of substituted benzenes. The leaving group departs as nitrogen gas, and this easy elimination is the driving force for the substitution reaction.
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
In the Sandmeyer reaction, for example, the diazonio group is replaced by a chloro, bromo,...
2.7K
01:261° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
3.9K
Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
3.9K