Dinitrogen tetroxide

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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).
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Infobox references

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

References[eedit | eedit soorce]

  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