Английская Википедия:Dinitrobenzene

Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску

Dinitrobenzenes are nitrobenzenes composed of a benzene ring and two nitro group (-NO2) substituents. The three possible arrangements of the nitro groups afford three isomers, 1,2-dinitrobenzene, 1,3-dinitrobenzene, and 1,4-dinitrobenzene. Each isomer has the chemical formula C6H4N2O4 and a molar mass of about 168.11 g/mol. 1,3-Dinitrobenzene is the most common isomer and it is used in the manufacture of explosives.

Properties

The dinitrobenzenes are all crystalline solids. The boiling points of the three isomers are relatively close; however, the melting points significantly differ. 1,4-Dinitrobenzene, which has the highest symmetry, has the highest melting point.

Dinitrobenzenes
IUPAC name 1,2-Dinitrobenzene 1,3-Dinitrobenzene 1,4-Dinitrobenzene
Other names o-Dinitrobenzene m-Dinitrobenzene p-Dinitrobenzene
Chemical structure Файл:O-Dinitrobenzol.svg Файл:M-Dinitrobenzol.svg Файл:P-Dinitrobenzol.svg
CAS number 528-29-0 99-65-0 100-25-4
25154-54-5 (Unspecified isomers)[1]
PubChem Шаблон:PubChem Шаблон:PubChem Шаблон:PubChem
Chemical formula C6H4N2O4
Molar mass 168.11 g/mol
Magnetic Susceptibility -65.98·10−6 cm3/mol -70.53·10−6 cm3/mol -68.30·10−6 cm3/mol
Physical state solid
Appearance white solid yellowish solid pale yellow solid[2]
Melting point 118 °C[3] 89.6 °C[4] 174 °C[5]
Boiling point 318 °C[3] 297 °C[4] 299 °C[6]
Density 1.565 g/cm3 (17 °C)[6] 1.575 g/cm3 (18 °C)[6] 1.625 g/cm3 (18 °C)[6]
Vapor pressure 0.08 Pa (30 °C)[7] 0.07 Pa (30 °C)[7]
0.34 Pa (50 °C)[7] 0.23 Pa (50 °C)[7]
Solubility Insoluble in water
GHS hazardsШаблон:GHS2021 Файл:GHS-pictogram-skull.svg Файл:GHS-pictogram-silhouette.svg Файл:GHS-pictogram-pollu.svg
H phrases Шаблон:H-phrases
P phrases Шаблон:P-phrases

References

Шаблон:Reflist