TheInfoListRev V3.51

Topic summary

Neopentane

Related topics
Names Preferred IUPAC name
2,2-Dimethylpropane
Other names
Neopentane
Tetramethylmethane
Identifiers
3D model (JSmol)
Abbreviations Me4C 1730722 ChEBI
ChemSpider
ECHA InfoCard100.006.677EC Number
  • 207-343-7
1850 MeSHneopentane
UNII
UN number2044
  • InChI=1S/C5H12/c1-5(2,3)4/h1-4H3
    Key: CRSOQBOWXPBRES-UHFFFAOYSA-N
  • CC(C)(C)C
Properties C(CH3)4Molar mass72.151 g·mol Appearance Colorless gas OdorOdorless Density
  • 3.255 kg/m
  • 601.172 kg/m (liquid, 9.5 °C)
Melting point−16.5 °C (2.3 °F; 256.6 K) Boiling point9.5 °C (49.1 °F; 282.6 K) 33.2 mg/L SolubilitySoluble in ethanol, diethyl ether, carbon tetrachloridelog P3.11 Vapor pressure146 kPa (at 20 °C) 4.7 nmol Pa kg 1.3476 (at 6 °C) Thermochemistry 121.07–120.57 J K mol 217 J K mol −168.5–−167.3 kJ mol −3.51506–−3.51314 MJ mol Hazards GHS labelling: DangerH220, H411P203, P210, P222, P273, P280, P377, P381, P391, P403, P501NFPA 704 (fire diamond)
2
4
0
450 °C (842 °F; 723 K) Related compounds
Related alkanes
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkYverify (  ?)

Neopentane, also called 2,2-dimethylpropane, is a double-branched-chain alkane with five carbon atoms, with the chemical formulaC(CH3)4. Neopentane is a flammablegas at room temperature and pressure which can condense into a highly volatileliquid on a cold day, in an ice bath, or when compressed to a higher pressure.

Neopentane is the simplest alkane with a quaternary carbon, and has achiral tetrahedral symmetry. It is one of the three structural isomers with the molecular formula C5H12 (pentanes), the other two being n-pentane and isopentane. Out of these three, it is the only one to be a gas at standard conditions; the others are liquids.

It was first synthesized by Russian chemist in 1870.

Wikipedia source