2-Methylpentane

2-Methylpentane, also called isohexane, is a branched-chain alkane with molecular formula C₆H₁₄. Its carbon skeleton consists of a five-carbon chain with a methyl group attached to carbon 2.

Alkane: A saturated hydrocarbon containing only carbon–carbon single bonds. 2-Methylpentane belongs to this hydrocarbon family.
Hexane: The straight-chain alkane with molecular formula C₆H₁₄. Hexane has the same formula but an unbranched carbon skeleton.
Gasoline: A volatile liquid fuel mixture composed mainly of hydrocarbons. 2-Methylpentane occurs among the hydrocarbons found in gasoline.
London dispersion force: An intermolecular attraction caused by temporary fluctuations in electron distribution. These attractions largely determine how its nonpolar molecules interact.
Structural isomer: One of two or more compounds with the same molecular formula but different atom connectivity. C₆H₁₄ has several distinct carbon skeletons, including this one.
2,2-Dimethylbutane: A highly branched alkane with molecular formula C₆H₁₄ and two methyl groups on carbon 2. It is another constitutional isomer of 2-methylpentane.
Petroleum ether: A low-boiling mixture of petroleum-derived hydrocarbons used mainly as a solvent. Isohexane can occur in light petroleum fractions used as solvents.
Boiling point: The temperature at which a liquid's vapor pressure equals the surrounding pressure. Its branching affects boiling point by changing molecular contact and dispersion attractions.
IUPAC nomenclature: A standardized system for naming chemical compounds according to their structures. Its name encodes a five-carbon parent chain and a methyl substituent at carbon 2.
2,3-Dimethylbutane: A branched alkane with molecular formula C₆H₁₄ and methyl groups on carbons 2 and 3. Its differently branched skeleton provides another comparison within the hexane isomers.

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