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Butane molecule represented on a staggered and eclipsed Newman projection down a carbon-carbon bond Butane molecule and all of its possible Newman conformations represented on a relative energy diagram. The diagram takes staggered and eclipsed conformations, as well as gauche and anti interactions into account.
Butane (/ ˈ b juː t eɪ n /) is an alkane with the formula C 4 H 10. Butane exists as two isomers, n-butane with connectivity CH 3 CH 2 CH 2 CH 3 and iso-butane with the formula (CH 3) 3 CH. Both isomers are highly flammable, colorless, easily liquefied gases that quickly vaporize at room temperature and pressure.
English: Newman projections of butane conformations & their relative energy differences (not total energies). Conformations form when butane rotates about one of its single covalent bond. Torsional/dihedral angle is shown on x-axis. Conformations (according to IUPAC): A: antiperiplanar, anti or trans B: synclinal or gauche C: anticlinal or eclipsed
English: Skeleton diagram of an i-Butane molecule. Date: 29 April 2007: Source: Own work . This W3C-unspecified vector image was created with Inkscape. Author:
For example, butane has three conformers relating to its two methyl (CH 3) groups: two gauche conformers, which have the methyls ±60° apart and are enantiomeric, and an anti conformer, where the four carbon centres are coplanar and the substituents are 180° apart (refer to free energy diagram of butane).
Skeletal structural formula of Vitamin B 12.Many organic molecules are too complicated to be specified by a molecular formula.. The structural formula of a chemical compound is a graphic representation of the molecular structure (determined by structural chemistry methods), showing how the atoms are possibly arranged in the real three-dimensional space.
2 Structure and properties. 3 Thermodynamic properties. 4 Vapor pressure of liquid. ... n-Butane: Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
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