Four-carbon molecules are based on a skeleton made from four carbon atoms. They may be in a chain, branched chains, cycles or even bicyclic compounds
Hydrocarbons that include four atoms are:
butane C4H10 isobutane C4H10 but-1-ene C4H8 but-2-ene C4H8 but-1-yne C4H6 but-2-yne C4H6 isobutylene C4H8 butadiene C4H6 1,2-butadiene C4H6 vinylacetylene C4H4 diacetylene C4H2 butatriene C4H4 cyclobutane C4H8 cyclobutene C4H6 cyclobutyne C4H4 cyclobutadiene C4H4 methylenecyclopropene C4H4 bicyclobutane C4H6 1-bicyclobutene C4H4 Δ1,3-bicyclobutene C4H4 propalene C4H2 methylcyclopropane C4H8 1-methylcyclopropene C4H6 3-methylcyclopropene C4H6 methylenecyclopropane C4H6 3-methylcyclopropyne C4H4 methylenecyclopropyne C4H2 tetrahedrane C4H4
See also List of compounds with carbon number 4