2,2-Dimethylbutane

2,2-Dimethylbutane
2,2-Dimethylbutane
IUPAC name
2,2-Dimethylbutane
Other names
Neohexane
Identifiers
CAS number 75-83-2 YesY
ChemSpider 6163 YesY
ChEMBL CHEMBL142735 YesY
Jmol-3D images Image 1
Properties
Molecular formula (CH3)3CCH2CH3
Molar mass 86.17 g/mol
Appearance colorless liquid
Density 0.649 g/l, liquid
Melting point

-98.8 °C, 174 K, -146 °F
Boiling point

49.73 °C, 323 K, 122 °F
Solubility in water Insoluble
Thermochemistry
Std enthalpy of
formation ΔfHo298		 −44.5 kJ/mol
Hazards
EU classification Highly flammable (F+)
Harmful (Xn)
Dangerous for
the environment (N)
R-phrases R11 R20 R48 R51/53 R62 R65 R67
S-phrases S9 S16 S29 S33 S36 S37 S61 S62
NFPA 704
NFPA 704.svg
3
1
0
Flash point −29 °C (closed cup)
Related compounds
Related alkanes Butane
Hexane
 YesY (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

2,2-Dimethylbutane, trivially known as neohexane, is an organic compound with formula C6H14 or (H3C-)3-C-CH2-CH3. It is therefore an alkane, indeed the most compact and branched of the hexane isomers — the only one with a quaternary carbon and a butane (C4) backbone.

See also

  • methylbutane (isopentane)
  • 2,3-dimethylbutane
  • 2,2,3-trimethylbutane (triptane)
  • 2,2,3,3-tetramethylbutane
  • 2-methylpentane (isohexane)
  • 2,2-dimethylpentane (neoheptane)

References


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