Alkenes

(noun)

An unsaturated hydrocarbon containing at least one carbon–carbon double bond.

Related Terms

  • stereoisomer
  • ozone
  • alkyne
  • diamagnetic

(noun)

In organic chemistry, an alkene, olefin, is an unsaturated chemical compound containing at least one carbon-to-carbon double bond.

Related Terms

  • stereoisomer
  • ozone
  • alkyne
  • diamagnetic

Examples of Alkenes in the following topics:

  • Properties of Alkenes

    • Alkenes contain a double bond that is composed of one sigma and one pi bond between two carbon atoms.
    • Alkene isomers that can achieve more regular packing have higher melting and boiling points than molecules with the same molecular formula but weaker dispersion forces.
    • Alkenes are non-polar, and they are both immiscible in water and less dense than water.
    • Alkenes are more reactive than their related alkanes due to the relative instability of the double bond.
    • Alkenes can also be reacted, typically in the presence of a catalyst, to form polymers.
  • Alkenes & Alkynes

    • Alkenes and alkynes are hydrocarbons which respectively have carbon-carbon double bond and carbon-carbon triple bond functional groups.
  • Naming Alkenes and Alkynes

    • Alkenes and alkynes are named similarly to alkanes, based on the longest chain that contains the double or triple bond.
    • Alkenes are hydrocarbons that contain one or more double bonds, while alkynes contain one or more triple bonds.
    • Alkene and alkyne compounds are named by identifying the longest carbon chain that contains both carbons of the double or triple bond.
  • Configurational Stereoisomers of Alkenes

  • Addition Reactions of Alkenes

  • Reactions of Alkenes and Alkynes

    • Alkenes and alkynes are more reactive than alkanes due to their pi bonds.
    • Alkenes and alkynes are generally more reactive than alkanes due to the electron density available in their pi bonds.
    • Alkenes undergo diverse cycloaddition reactions.
    • Alkenes and alkynes can also be halogenated with the halogen adding across the double or triple bond, in a similar fashion to hydrogenation.
    • Alkenes and alkynes can react with hydrogen halides like HCl and HBr.
  • Nomenclature of Alkene Stereoisomers

    • In the isomers illustrated under Configurational Stereoisomers of Alkenes, for which cis-trans notation was adequate, Z is equivalent to cis and E is equivalent to trans.
  • Introduction to Hydrocarbons

    • Alkenes and alkynes are known as unsaturated hydrocarbons because some of the carbons are connected to fewer than four neighboring atoms.
    • Alkenes contain at least one double bond, while alkynes contain at least one triple bond.
  • Hydrogenation

  • Non-Ionic Reactions

Subjects
  • Accounting
  • Algebra
  • Art History
  • Biology
  • Business
  • Calculus
  • Chemistry
  • Communications
  • Economics
  • Finance
  • Management
  • Marketing
  • Microbiology
  • Physics
  • Physiology
  • Political Science
  • Psychology
  • Sociology
  • Statistics
  • U.S. History
  • World History
  • Writing

Except where noted, content and user contributions on this site are licensed under CC BY-SA 4.0 with attribution required.