乙烯

概览

乙烯

加成聚合消耗碳碳双键。不同聚合工艺产生不同的聚乙烯结构和牌号。

Identifiers

化学式

C2H4

官能团

C=C

摩尔质量

28.05 g/mol

Also known as

ethylene, ethene

性质

熔点

-169.18 °C

沸点

-103.8 °C

液体密度

0.56765 g/cm³ at −103.77 °C and 1.013 bar

水中溶解度

In water, 131 mg/L at 25 °C

Related compounds

• 烯烃

Connected reactions

• Hydration: Ethene → Ethanol

  乙烯通过水合生成乙醇。

• Dehydration: Ethanol → Ethene

  乙醇通过脱水生成乙烯。

• Elimination: Bromoethane → Ethene

  碱移去与溴相邻的碳上的氢。溴离去时，C-H 键电子形成 C=C 的 π 键；该消去过程脱去 H 和 Br，而不改变两碳骨架。

参考文献

1. Poly(ethene): structure, manufacture and usesChemical Industry Education Centre, University of York
2. PubChem: EtheneNational Center for Biotechnology Information

   Identity retrieved 2026-09-08; matched against the record's isomeric structure. Unspecified stereochemistry remains unspecified.

3. Hazardous Substances Data Bank (HSDB): Ethene — melting pointHazardous Substances Data Bank (HSDB)

   Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6325#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-256

4. Hazardous Substances Data Bank (HSDB): Ethene — boiling pointHazardous Substances Data Bank (HSDB)

   Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6325#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-256

5. Air Liquide Gas Encyclopedia: Ethylene — liquid densityAir Liquide

   Liquid ethene density: 567.65 kg/m³ at −103.77 °C and 1.013 bar, checked 2026-09-08. Conversion: 1 g/cm³ = 1000 kg/m³.

6. Hazardous Substances Data Bank (HSDB): Ethene — solubilityHazardous Substances Data Bank (HSDB)

   Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/6325#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: McAuliffe C; J Phys Chem 70: 1267-75 (1966)