Chemical Formula For Pentasulfur Dinitride


Pentasulfur dinitride, with the chemical formula S5N2, is an inorganic compound composed of sulfur and nitrogen atoms. It is a highly reactive substance that can be synthesized in the laboratory but is not found naturally. This compound has many interesting properties and applications in various fields, making it an important area of study in chemistry. In this article, we will explore the chemical structure, properties, synthesis methods, and uses of pentasulfur dinitride.

Chemical Structure

The chemical formula for pentasulfur dinitride is S5N2, indicating that the compound contains five sulfur atoms and two nitrogen atoms. The molecular structure of S5N2 consists of a central N2 unit surrounded by five S atoms, forming a pentagonal ring. The nitrogen atoms are connected to each other by a triple bond, while the sulfur atoms are bonded to the nitrogen atoms and each other through single bonds. This unique arrangement of atoms gives pentasulfur dinitride its distinct chemical properties.


Pentasulfur dinitride is a yellow, crystalline solid that is highly reactive and sensitive to heat, shock, and friction. It is insoluble in water but soluble in organic solvents such as carbon disulfide. The compound has a strong sulfur-like odor and is toxic if inhaled or ingested. It can decompose violently when exposed to heat or light, releasing toxic gases such as nitrogen dioxide and sulfur dioxide.
Despite its hazardous nature, pentasulfur dinitride has several interesting properties that make it useful in various applications. It is a powerful oxidizing agent and can react vigorously with reducing agents, releasing large amounts of energy. The compound also exhibits semiconducting properties, making it a potential candidate for electronic devices and sensors.


The synthesis of pentasulfur dinitride can be achieved through various methods, depending on the desired purity and yield of the compound. One common approach is the reaction of sulfur and nitrogen precursors under high-temperature and high-pressure conditions. For example, sulfur reacts with ammonium azide (NH4N3) to produce pentasulfur dinitride:
2S + 5NH4N3 → S5N2 + 5N2 + 6H2
Another method involves the reaction of sulfur dichloride (SCl2) with ammonia gas (NH3) in the presence of a catalyst:
3SCl2 + 5NH3 → S5N2 + 6NH4Cl
These synthetic routes yield impure forms of pentasulfur dinitride, which can be further purified through recrystallization or distillation techniques.


Pentasulfur dinitride has several important applications in industry and research due to its unique properties. One of the main uses of the compound is as an oxidizing agent in organic synthesis. It can react with various organic compounds to introduce sulfur or nitrogen functionalities, leading to the formation of new molecules and materials.
Additionally, pentasulfur dinitride is used in the production of semiconductor materials and devices. Its semiconducting properties make it a promising candidate for electronic applications, such as in sensors, transistors, and photovoltaic cells. Researchers are also exploring the potential of S5N2 in catalysis and energy storage devices due to its reactivity and stability under certain conditions.


In conclusion, pentasulfur dinitride (S5N2) is a fascinating inorganic compound with unique chemical and physical properties. Despite its hazardous nature, the compound has several important applications in various fields, including organic synthesis, semiconductor technology, and energy storage. By understanding the chemical structure, properties, synthesis methods, and uses of pentasulfur dinitride, researchers can continue to explore its potential in advancing science and technology.

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