2,2-Dimethylbutane

2,2-Dimethylbutane

Stereo, skeletal formula of 2,2-dimethylbutane with some implicit hydrogens shown
Ball stick model of 2,2-dimethylbutane Spacefill model of 2,2-dimethylbutane
Names
IUPAC name 2,2-Dimethylbutane
Other names Neohexane, 22DMB
Identifiers
CAS Number	75-83-2 Y
Beilstein Reference	1730736
ChEMBL	ChEMBL142735 Y
ChemSpider	6163 Y
EC Number	1730736
Jmol 3D model	Interactive image
PubChem	6403
UN number	1208
InChI InChI=1S/C6H14/c1-5-6(2,3)4/h5H2,1-4H3 Y Key: HNRMPXKDFBEGFZ-UHFFFAOYSA-N Y
SMILES CCC(C)(C)C
Properties
Chemical formula	C6H14
Molar mass	86.18 g·mol−1
Appearance	Colorless liquid
Odor	Odorless
Density	649 mg mL−1
Melting point	−102 to −98 °C; −152 to −145 °F; 171 to 175 K
Boiling point	49.7 to 49.9 °C; 121.4 to 121.7 °F; 322.8 to 323.0 K
log P	3.51
Vapor pressure	36.88 kPa (at 20 °C)
Henry's law constant (kH)	6.5 nmol Pa−1 kg−1
Refractive index (nD)	1.369
Thermochemistry
Specific heat capacity (C)	189.67 J K−1 mol−1
Std molar entropy (So298)	272.00 J K−1 mol−1
Std enthalpy of formation (ΔfHo298)	−214.4–−212.4 kJ mol−1
Std enthalpy of combustion (ΔcHo298)	−4.1494–−4.1476 MJ mol−1
Vapor pressure	{{{value}}}
Related compounds
Related alkanes	Neopentane 2,3-Dimethylbutane Triptane Tetramethylbutane Tetraethylmethane 2,2,4-Trimethylpentane 2,3,3-Trimethylpentane 2,3,4-Trimethylpentane Tetra-tert-butylmethane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
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. It can be synthesised by the hydroisomerisation of 2,3-dimethylbutane using an acid catalyst.

See also

• methylbutane (isopentane)
• 2-Methylpentane (isohexane)