Alkenes (Olefins)
| Formula / Notation | CₙH₂ₙ (acyclic); R-CH=CH-R' (general) |
|---|---|
| Also Known As | Olefins; alkene hydrocarbons; unsaturated hydrocarbons (monounsaturated); CₙH₂ₙ series; ethylene (ethene) |
What is Alkenes (Olefins)?
Alkenes (also called olefins) are unsaturated hydrocarbons containing at least one carbon–carbon double bond (C=C). The general formula for acyclic alkenes is CₙH₂ₙ. The simplest alkene is ethene (ethylene, CH₂=CH₂). Alkenes are more reactive than alkanes due to the π bond in the double bond, which readily undergoes addition reactions.
Formula & Notation
Other Names / Synonyms: Olefins; alkene hydrocarbons; unsaturated hydrocarbons (monounsaturated); CₙH₂ₙ series; ethylene (ethene)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Alkenes (also called olefins) are unsaturated hydrocarbons containing at least one carbon–carbon double bond (C=C). The general formula for acyclic alkenes is CₙH₂ₙ. The simplest alkene is ethene (ethylene, CH₂=CH₂). Alkenes are more reactive than alkanes due to the π bond in the double bond, which readily undergoes addition reactions.
Ethylene is the largest-volume organic chemical produced (polyethylene, PVC, ethylene glycol); propylene for polypropylene and acrylics; industrial monomers for polymers; starting materials for alcohols, aldehydes, and other organic compounds; ripening agent (ethylene gas)
Lower alkenes are highly flammable gases or volatile liquids. Ethylene and propylene are explosive when mixed with air in certain proportions. Some alkenes are irritants. Proper ventilation and flame precautions required. Industrial-scale alkene handling requires explosion-proof equipment.
The formula or notation for Alkenes (Olefins) is: CₙH₂ₙ (acyclic); R-CH=CH-R' (general)