Dinitrogen tetroxide, likewise known as nitrogen tetroxide, is a inorganic compound supplied as reagent in synthesis of various compounds.

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Formula and also structure: Dinitrogen tetroxide chemistry formula is N2O4 and the molar mass is 92.01 g mol-1. The framework of the oxide is developed by 2 -NO2joined through one single bond in a planar structure. Its chemistry structure have the right to be created as below, in the typical representations offered for essential molecules.


Occurrence: Dinitrogen tetroxide is not discovered in nature.

Preparation: Dinitrogen tetroxide is all set in laboratories to be used as reagent in reactions. The is ready from ammonia the is oxidized come nitric oxide, which is in succession oxidized come nitrogen dioxide:

4 NH3 + 5 O2 → 4 NO + 6 H2O

2 NO + O2 → 2 NO2

Nitrogen dioxide i beg your pardon is then dimerized into nitrogen tetroxide:

2 NO2 ⇌ N2O4

A second an approach is the reaction that nitric acid and metallic copper.

2 HNO3 → N2O4

Physical properties: Dinitrogen tetroxide is a colorless liquid in equilibrium with an orange gas. Its thickness is 1.44 g mL-1. The melting point of the compound is -11.2 °C, the boiling suggest is 21.69 °C and above this temperature, that decomposes to NO2. Dinitrogen tetroxide is no soluble in water, when adding to water, it reaction to kind nitric acid and also nitrous acid.

Chemical properties: Dinitrogen tetroxide keeps an equilibrium v nitrogen dioxide, v the reaction:

N2O4 ⇌ 2 NO2

This equilibrium breaks irreversible the N-N bond in dinitrogen tetroxide, originating the solitary molecule NO2.

One of the main uses the dinitrogen tetroxide is the production of nitrous and also nitric acid, through the reaction of that in water:

N2O4 + H2O → HNO2 + HNO3

Uses: Dinitrogen tetroxide is offered as rocket propellant. Its physics state the liquid provides it appropriate to be provided as propellant where it is mixed with another nitrogen compound, hydrazine. Dinitrogen tetroxide is likewise used as reagent in some reactions as result of it is a good oxidizer.

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Health effects / security hazards: Dinitrogen tetroxide is noxious for health. That can cause headache, nausea, challenge in breathing, lethargy and also rapid pulse. If the exposure continues, that can likewise cause asphyxiation and pulmonary edema. In ~ high temperature, the decomposes come NOx gases and also can react v wood and other combustibles. It have the right to react v reducing materials.