==Nomenclature== Isobutane is the trivial name retained by the International Union of Pure and Applied Chemistry (IUPAC) in its 1993 Recommendations for the Nomenclature of Organic Chemistry. Since the longest continuous chain in isobutane contains only three carbon atoms, the full systematic name is 2-methylpropane but the locant (2-) is typicall...
(from the article `butane`) ...formula is C4H10. The compound in which the carbon atoms are linked in a straight chain is denoted normal butane, or n-butane; the branched-chain ...
See: butane. ... (05 Mar 2000) ... 
Type: Term Pronunciation: ī′sō-byū′tān See: butane
a colorless, flammable gas, CH, used as a fuel, as a refrigerant, and in the manufacture of gasoline by alkylation.