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

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Formula and structure: Dinitrogen tetroxide chemistry formula is N2O4 and the molar massive is 92.01 g mol-1. The structure of the oxide is formed by 2 -NO2joined by one single bond in a planar structure. Its chemistry structure can be composed as below, in the usual representations used for essential molecules.


Occurrence: Dinitrogen tetroxide is not discovered in nature.

Preparation: Dinitrogen tetroxide is prepared in laboratories to be offered as reagent in reactions. The is ready from ammonia that is oxidized come nitric oxide, i beg your pardon is in succession oxidized to nitrogen dioxide:

4 NH3 + 5 O2 → 4 NO + 6 H2O

2 NO + O2 → 2 NO2

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

2 NO2 ⇌ N2O4

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

2 HNO3 → N2O4

Physical properties: Dinitrogen tetroxide is a colorless fluid in equilibrium v an orange gas. Its thickness is 1.44 g mL-1. The melting suggest of the compound is -11.2 °C, the boiling suggest is 21.69 °C and above this temperature, that decomposes come NO2. Dinitrogen tetroxide is not soluble in water, when adding to water, it reacts to kind nitric acid and also nitrous acid.

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

N2O4 ⇌ 2 NO2

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

One of the key uses that dinitrogen tetroxide is the manufacturing of nitrous and nitric acid, through the reaction of that in water:

N2O4 + H2O → HNO2 + HNO3

Uses: Dinitrogen tetroxide is provided as rocket propellant. Its physical state of liquid makes it appropriate to be used as propellant wherein it is combined with another nitrogen compound, hydrazine. Dinitrogen tetroxide is likewise used as reagent in some reactions as result of it is a great oxidizer.

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Health effects / safety and security hazards: Dinitrogen tetroxide is noxious for health. The can cause headache, nausea, difficulty in breathing, lethargy and also rapid pulse. If the exposure continues, it can additionally cause asphyxiation and also pulmonary edema. In ~ high temperature, it decomposes to NOx gases and can react v wood and also other combustibles. It deserve to react v reducing materials.