Ethylene

• Formula: C₂H₄
• Molecular weight: 28.0532
• IUPAC Standard InChI: InChI=1S/C2H4/c1-2/h1-2H2 Copy

  
• IUPAC Standard InChIKey: VGGSQFUCUMXWEO-UHFFFAOYSA-N Copy
• CAS Registry Number: 74-85-1
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Isotopologues:
  • (Z)-Ethylene-1,2-d2
• Other names: Ethene; Acetene; Bicarburretted hydrogen; Elayl; Olefiant gas; C2H4; Athylen; Liquid ethyene; UN 1038; UN 1962
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data (reactions 1 to 50)
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data: reactions 51 to 54
  • Henry's Law data
  • Ion clustering data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Vibrational and/or electronic energy levels
  • Gas Chromatography
  • Fluid Properties
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
  • Electron-Impact Ionization Cross Sections (on physics web site)
  • Gas Phase Kinetics Database
• Options:
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Condensed phase thermochemistry data

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Reaction thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
B - John E. Bartmess
MS - José A. Martinho Simões
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Reactions 1 to 50

C₂H₃^- +  =

By formula: C₂H₃^- + H⁺ = C₂H₄

C₇H₄CrO₅ (g) = C₅CrO₅ (g) +  (g)

By formula: C₇H₄CrO₅ (g) = C₅CrO₅ (g) + C₂H₄ (g)

 +  = ( • )

By formula: Ag⁺ + C₂H₄ = (Ag⁺ • C₂H₄)

Free energy of reaction

 +  = ( • )

By formula: H₄N⁺ + C₂H₄ = (H₄N⁺ • C₂H₄)

Free energy of reaction

 +  = ( • )

By formula: Co⁺ + C₂H₄ = (Co⁺ • C₂H₄)

Enthalpy of reaction

=  + 

By formula: C₂H₅Cl = C₂H₄ + HCl

 +  = ( • )

By formula: Cr⁺ + C₂H₄ = (Cr⁺ • C₂H₄)

Enthalpy of reaction

 +  = ( • )

By formula: Ni⁺ + C₂H₄ = (Ni⁺ • C₂H₄)

Enthalpy of reaction

 +  = ( • )

By formula: Cu⁺ + C₂H₄ = (Cu⁺ • C₂H₄)

Enthalpy of reaction

 +  = ( • )

By formula: Sc⁺ + C₂H₄ = (Sc⁺ • C₂H₄)

Enthalpy of reaction

 +  = ( • )

By formula: La⁺ + C₂H₄ = (La⁺ • C₂H₄)

Enthalpy of reaction

 +  = ( • )

By formula: Y⁺ + C₂H₄ = (Y⁺ • C₂H₄)

Enthalpy of reaction

 +  = ( • )

By formula: Ti⁺ + C₂H₄ = (Ti⁺ • C₂H₄)

Enthalpy of reaction

 +  = ( • )

By formula: V⁺ + C₂H₄ = (V⁺ • C₂H₄)

Enthalpy of reaction

 +  = ( • )

By formula: Fe⁺ + C₂H₄ = (Fe⁺ • C₂H₄)

Enthalpy of reaction

 +  =

By formula: C₂H₄ + Br₂ = C₂H₄Br₂

 +  =

By formula: C₂H₄ + I₂ = C₂H₄I₂

( • ) +  = ( • 2)

By formula: (Ag⁺ • C₂H₄) + C₂H₄ = (Ag⁺ • 2C₂H₄)

 +  =

By formula: H₂ + C₂H₄ = C₂H₆

=  + 

By formula: C₂H₅Br = HBr + C₂H₄

C₃H₉Si⁺ +  = (C₃H₉Si⁺ • )

By formula: C₃H₉Si⁺ + C₂H₄ = (C₃H₉Si⁺ • C₂H₄)

C₂H₄⁺ +  = (C₂H₄⁺ • )

By formula: C₂H₄⁺ + C₂H₄ = (C₂H₄⁺ • C₂H₄)

C₆H₄FeO₄ (l) = 4 (g) +  (cr) +  (g)

By formula: C₆H₄FeO₄ (l) = 4CO (g) + Fe (cr) + C₂H₄ (g)

=  + 

By formula: C₈H₁₂ = C₆H₈ + C₂H₄

 +  = ( • )

By formula: F^- + C₂H₄ = (F^- • C₂H₄)

Rh⁺ +  = (Rh⁺ • )

By formula: Rh⁺ + C₂H₄ = (Rh⁺ • C₂H₄)

Enthalpy of reaction

C₇H₉Cl₂NPd (solution) +  (l) = (PdCl₂(C₅H₅N)₂) (solution) +  (solution)

By formula: C₇H₉Cl₂NPd (solution) + C₄H₄N₂ (l) = (PdCl₂(C₅H₅N)₂) (solution) + C₂H₄ (solution)

 (solution) +  (solution) = C₁₃H₁₉O₂Rh (solution) + 2 (solution)

By formula: C₉H₁₅O₂Rh (solution) + C₈H₁₂ (solution) = C₁₃H₁₉O₂Rh (solution) + 2C₂H₄ (solution)

 (g) + C₂H₃BrMg (solution) =  (solution) + Br₂Mg (solution)

By formula: HBr (g) + C₂H₃BrMg (solution) = C₂H₄ (solution) + Br₂Mg (solution)

C₆HCrO₆⁺ +  = (C₆HCrO₆⁺ • )

By formula: C₆HCrO₆⁺ + C₂H₄ = (C₆HCrO₆⁺ • C₂H₄)

 +  = ( • )

By formula: Al⁺ + C₂H₄ = (Al⁺ • C₂H₄)

(CAS Reg. No. 25013-41-6 • 4294967295) +  = CAS Reg. No. 25013-41-6

By formula: (CAS Reg. No. 25013-41-6 • 4294967295C₂H₄) + C₂H₄ = CAS Reg. No. 25013-41-6

 +  =  + 

By formula: H₂ + C₂H₃Cl = C₂H₄ + HCl

 +  =

By formula: C₂H₄ + Cl₂ = C₂H₄Cl₂

=  +  + 

By formula: C₂H₄ClI = I + Cl + C₂H₄

(C₂H₄⁺ • ) +  = (C₂H₄⁺ • 2)

By formula: (C₂H₄⁺ • C₂H₄) + C₂H₄ = (C₂H₄⁺ • 2C₂H₄)

C₁₂H₁₄Mo (cr) +  (cr) = C₁₀H₁₀I₂Mo (cr) +  (g)

By formula: C₁₂H₁₄Mo (cr) + I₂ (cr) = C₁₀H₁₀I₂Mo (cr) + C₂H₄ (g)

 (cr) + 2 (g) =  (cr) + 2 (g)

By formula: C₉H₁₅O₂Rh (cr) + 2CO (g) = C₇H₇O₄Rh (cr) + 2C₂H₄ (g)

C₉H₁₅IrO₂ (cr) + 2 (g) = C₇H₇IrO₄ (cr) + 2 (g)

By formula: C₉H₁₅IrO₂ (cr) + 2CO (g) = C₇H₇IrO₄ (cr) + 2C₂H₄ (g)

( • ) +  = ( • 2)

By formula: (Fe⁺ • C₂H₄) + C₂H₄ = (Fe⁺ • 2C₂H₄)

( • ) +  = ( • 2)

By formula: (Cr⁺ • C₂H₄) + C₂H₄ = (Cr⁺ • 2C₂H₄)

( • ) +  = ( • 2)

By formula: (Mn⁺ • C₂H₄) + C₂H₄ = (Mn⁺ • 2C₂H₄)

( • ) +  = ( • 2)

By formula: (V⁺ • C₂H₄) + C₂H₄ = (V⁺ • 2C₂H₄)

( • ) +  = ( • 2)

By formula: (Ni⁺ • C₂H₄) + C₂H₄ = (Ni⁺ • 2C₂H₄)

( • ) +  = ( • 2)

By formula: (Co⁺ • C₂H₄) + C₂H₄ = (Co⁺ • 2C₂H₄)

( • ) +  = ( • 2)

By formula: (Cu⁺ • C₂H₄) + C₂H₄ = (Cu⁺ • 2C₂H₄)

=  + 

By formula: C₇H₁₀ = C₅H₆ + C₂H₄

2 =

By formula: 2C₂H₄ = C₄H₈

=  + 

By formula: C₂H₄I₂ = C₂H₄ + I₂

 +  =

By formula: C₄H₈ + C₂H₄ = C₆H₁₂

Gas phase ion energetics data

Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C₂H₄⁺ (ion structure unspecified)

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

C₂H₃^- +  =

By formula: C₂H₃^- + H⁺ = C₂H₄

References

Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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Notes

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• Symbols used in this document:
  

  AE	Appearance energy
  Cp,liquid	Constant pressure heat capacity of liquid
  IE (evaluated)	Recommended ionization energy
  S°liquid	Entropy of liquid at standard conditions
  T	Temperature
  ΔfH(+) ion,0K	Enthalpy of formation of positive ion at 0K
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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