Open main menu

Dinitrogen tetroxide, commonly referred tae as nitrogen tetroxide, is the chemical compoond N2O4. It is a uisefu reagent in chemical synthesis.

Dinitrogen tetroxide
Full structural formula
Space-fillin model
Nitrogen dioxide at different temperaturs
Nitrogen dioxide at −196 °C, 0 °C, 23 °C, 35 °C, an 50 °C. (NO
2
) converts tae the colourless dinitrogen tetroxide (N
2
O
4
) at law temperaturs, an reverts tae NO
2
at heicher temperaturs.
Names
IUPAC name
Dinitrogen tetraoxide
Ither names
Dinitrogen(II) oxide(-I)
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.031.012
EC Nummer 234-126-4
RTECS nummer QW9800000
UNII
UN nummer 1067
Properties
N2O4
Molar mass 92.011 g/mol
Appearance Colourless liquid/Orange gas
Density 1.44246 g/cm3 (liquid, 21 °C)
Meltin pynt −11.2 °C (11.8 °F; 261.9 K) and decomposes to NO2
Bylin pynt 21.69 °C (71.04 °F; 294.84 K)
reacts
Vapour pressur 96 kPa (20 °C)[1]
Magnetic susceptibility −23.0·10−6 cm3/mol
Refractive index (nD) 1.00112
Structur
Molecular shape planar, D2h
zero
Thermochemistry
Staundart molar
entropy
So298
304.29 J K−1 mol−1[2]
Std enthalpy o
formation
ΔfHo298
+9.16 kJ/mol[2]
Hazards
Safety data sheet External MSDS
EU clessification Very Toxic T+ Corrosive C
R-phrases R26, R34
S-phrases (S1/2), S9, S26, S28, S36/37/39, S45
NFPA 704
Flash pynt Non-flammable
Relatit compoonds
Nitrous oxide
Nitric oxide
Dinitrogen trioxide
Nitrogen dioxide
Dinitrogen pentoxide
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
YesY verify (whit is YesYN ?)
Infobox references

ReferencesEedit

  1. International Chemical Safety Card
  2. 2.0 2.1 P.W. Atkins and J. de Paula, Physical Chemistry (8th ed., W.H. Freeman, 2006) p.999