Ethylene
- Formula: C2H4
- Molecular weight: 28.0532
- IUPAC Standard InChIKey: VGGSQFUCUMXWEO-UHFFFAOYSA-N
- 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:
- 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:
- Other data available:
- Reaction thermochemistry data: reactions 51 to 54
- Gas phase ion energetics data
- Ion clustering data
- IR Spectrum
- Mass spectrum (electron ionization)
- UV/Visible spectrum
- Fluid Properties
- Data at other public NIST sites:
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Vibrational and/or electronic energy levels, Gas Chromatography, 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:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | 52.47 | kJ/mol | Review | Chase, 1998 | Data last reviewed in September, 1965 |
ΔfH°gas | 52.4 ± 0.5 | kJ/mol | Review | Manion, 2002 | adopted recommendation of Gurvich, Veyts, et al., 1991; DRB |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°gas | -1411.20 ± 0.30 | kJ/mol | Cm | Rossini and Knowlton, 1937 | Reanalyzed by Cox and Pilcher, 1970, Original value = -1410.97 ± 0.30 kJ/mol; Corresponding ΔfHºgas = 52.52 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 219.32 | J/mol*K | Review | Chase, 1998 | Data last reviewed in September, 1965 |
Constant pressure heat capacity of gas
Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
33.26 | 50. | Thermodynamics Research Center, 1997 | p=1 bar. Recommended entropies and heat capacities are in good agreement with those obtained from other statistical thermodynamics calculations [ Chao J., 1975, Gurvich, Veyts, et al., 1989] as well as with ab initio value of S(298.15 K)=219.14 J/mol*K [ East A.L.L., 1997].; GT |
33.27 | 100. | ||
33.66 | 150. | ||
35.37 | 200. | ||
40.60 | 273.15 | ||
42.90 | 298.15 | ||
43.08 | 300. | ||
53.06 | 400. | ||
62.48 | 500. | ||
70.66 | 600. | ||
77.70 | 700. | ||
83.82 | 800. | ||
89.18 | 900. | ||
93.88 | 1000. | ||
98.00 | 1100. | ||
101.61 | 1200. | ||
104.76 | 1300. | ||
107.53 | 1400. | ||
109.96 | 1500. | ||
114.81 | 1750. | ||
118.37 | 2000. | ||
121.03 | 2250. | ||
123.06 | 2500. | ||
124.62 | 2750. | ||
125.86 | 3000. |
Constant pressure heat capacity of gas
Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
34.66 ± 0.26 | 178.15 | Burcik E.J., 1941 | Other experimental values of heat capacity [ Haas M.E., 1932] are less accurate, see [ Chao J., 1975]. Please also see Eucken A., 1933.; GT |
35.30 ± 0.26 | 192.35 | ||
36.29 ± 0.27 | 210.40 | ||
37.55 ± 0.28 | 230.90 | ||
39.02 ± 0.29 | 250.60 | ||
40.75 ± 0.02 | 270.7 | ||
41.02 ± 0.31 | 271.80 | ||
42.84 ± 0.32 | 293.45 | ||
43.47 ± 0.17 | 300.0 | ||
45.98 ± 0.04 | 320.7 | ||
49.74 ± 0.37 | 367.7 | ||
59.25 ± 0.44 | 463.6 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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Temperature (K) | 298. to 1200. | 1200. to 6000. |
---|---|---|
A | -6.387880 | 106.5104 |
B | 184.4019 | 13.73260 |
C | -112.9718 | -2.628481 |
D | 28.49593 | 0.174595 |
E | 0.315540 | -26.14469 |
F | 48.17332 | -35.36237 |
G | 163.1568 | 275.0424 |
H | 52.46694 | 52.46694 |
Reference | Chase, 1998 | Chase, 1998 |
Comment | Data last reviewed in September, 1965 | Data last reviewed in September, 1965 |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Vibrational and/or electronic energy levels, Gas Chromatography, 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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
S°liquid | 117.8 | J/mol*K | N/A | Chao, Hall, et al., 1983 |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
67.4 | 170. | Chao, Hall, et al., 1983 | T = 16 to 169 K. |
67.24 | 170. | Egan and Kemp, 1937 | T = 15 to 170 K. |
Phase change data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Vibrational and/or electronic energy levels, Gas Chromatography, 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 169. ± 1. | K | AVG | N/A | Average of 9 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 103.8 | K | N/A | Streng, 1971 | Uncertainty assigned by TRC = 0.2 K; TRC |
Tfus | 103.7 | K | N/A | Kistiakowsky, Romeyn, et al., 1935 | Uncertainty assigned by TRC = 0.5 K; TRC |
Tfus | 103.7 | K | N/A | Parks and Huffman, 1931 | Uncertainty assigned by TRC = 1. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 104.0 ± 0.1 | K | AVG | N/A | Average of 9 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ptriple | 0.0012 | bar | N/A | Jahangiri, Jacobsen, et al., 1986 | Uncertainty assigned by TRC = 0.00005 bar; TRC |
Ptriple | 0.0012 | bar | N/A | Jahangiri, 1984 | TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 282.5 ± 0.5 | K | AVG | N/A | Average of 10 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 50.6 ± 0.5 | bar | AVG | N/A | Average of 10 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Vc | 0.1311 | l/mol | N/A | Tsonopoulos and Ambrose, 1996 | |
Vc | 0.13099 | l/mol | N/A | Jahangiri, 1984 | Uncertainty assigned by TRC = 0.00002 l/mol; TRC |
Vc | 0.13098 | l/mol | N/A | Douslin and Harrison, 1976 | Uncertainty assigned by TRC = 0.0001 l/mol; TRC |
Vc | 0.12868 | l/mol | N/A | Angus, Armstrong, et al., 1974 | Uncertainty assigned by TRC = 0.0001 l/mol; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 7.63 ± 0.004 | mol/l | N/A | Tsonopoulos and Ambrose, 1996 | |
ρc | 7.6334 | mol/l | N/A | Jahangiri, Jacobsen, et al., 1986 | Uncertainty assigned by TRC = 0.004 mol/l; TRC |
ρc | 7.6341 | mol/l | N/A | Hastings, Levelt Sengers, et al., 1980 | Uncertainty assigned by TRC = 0.0007 mol/l; PVT, Burnett apparatus, Unct. value one standard deviation from fitting.; TRC |
ρc | 18.894 | mol/l | N/A | Angus, Armstrong, et al., 1974 | Uncertainty assigned by TRC = 0.007 mol/l; TRC |
ρc | 7.6986 | mol/l | N/A | Mathias, Crommelin, et al., 1929 | Uncertainty assigned by TRC = 0.02 mol/l; TRC |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
13.544 | 169.40 | N/A | Egan and Kemp, 1937 | DH |
14.0 | 267. | A | Stephenson and Malanowski, 1987 | Based on data from 252. to 282. K.; AC |
13.7 | 258. | A | Stephenson and Malanowski, 1987 | Based on data from 170. to 273. K.; AC |
14.4 | 155. | A | Stephenson and Malanowski, 1987 | Based on data from 120. to 170. K.; AC |
13.7 | 196. | A | Stephenson and Malanowski, 1987 | Based on data from 169. to 211. K.; AC |
13.6 | 239. | A | Stephenson and Malanowski, 1987 | Based on data from 209. to 254. K.; AC |
14.1 | 167. | A | Stephenson and Malanowski, 1987 | Based on data from 120. to 182. K. See also Dykyj, 1970.; AC |
14.0 | 175. | N/A | Michels and Wassenaar, 1950 | Based on data from 150. to 190. K.; AC |
14.3 | 161. | N/A | Lamb and Roper, 1940 | Based on data from 148. to 174. K.; AC |
14.4 | 156. | N/A | Egan and Kemp, 1937 | Based on data from 124. to 171. K.; AC |
Entropy of vaporization
ΔvapS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
79.95 | 169.40 | Egan and Kemp, 1937 | DH |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
149.37 to 188.57 | 3.87261 | 584.146 | -18.307 | Michels and Wassenaar, 1950 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
18.4 | 91.5 | A,MS | Stephenson and Malanowski, 1987 | Based on data from 79. to 104. K. See also Tickner and Lossing, 1951.; AC |
15.0 | 77. to 103. | N/A | Menaucourt, 1982 | AC |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
3.351 | 103.97 | Chao, Hall, et al., 1983 | DH |
3.351 | 103.95 | Egan and Kemp, 1937 | DH |
3.35 | 104. | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
32.23 | 103.97 | Chao, Hall, et al., 1983 | DH |
32.23 | 103.95 | Egan and Kemp, 1937 | DH |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Vibrational and/or electronic energy levels, Gas Chromatography, 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- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1704. ± 9. | kJ/mol | AVG | N/A | Average of 5 out of 6 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1677.8 ± 2.1 | kJ/mol | IMRE | Ervin, Gronert, et al., 1990 | gas phase; B |
ΔrG° | 1670. ± 8.8 | kJ/mol | H-TS | DePuy, Gronert, et al., 1989 | gas phase; B |
ΔrG° | 1668. ± 21. | kJ/mol | H-TS | Peerboom, Rademaker, et al., 1992 | gas phase; B |
ΔrG° | >1661.0 | kJ/mol | IMRB | Froelicher, Freiser, et al., 1986 | gas phase; B |
C7H4CrO5 (g) = C5CrO5 (g) + (g)
By formula: C7H4CrO5 (g) = C5CrO5 (g) + C2H4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 105. ± 4. | kJ/mol | KinG | McNamara, Becher, et al., 1994 | The reaction enthalpy was identified with the activation energy.; MS |
ΔrH° | 103. ± 10. | kJ/mol | KinG | Wells, House, et al., 1994 | The reaction enthalpy relies on the measured activation energy and on the assumption of a negligible barrier for product recombination Wells, House, et al., 1994.; MS |
By formula: Ag+ + C2H4 = (Ag+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 141. | kJ/mol | HPMS | Guo and Castleman, 1991 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 92.5 | J/mol*K | N/A | Guo and Castleman, 1991 | gas phase; Entropy change calculated or estimated; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
71.5 | 750. | HPMS | Guo and Castleman, 1991 | gas phase; Entropy change calculated or estimated; M |
By formula: H4N+ + C2H4 = (H4N+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 42. | kJ/mol | PHPMS | Deakyne and Meot-Ner (Mautner), 1985 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 84. | J/mol*K | N/A | Deakyne and Meot-Ner (Mautner), 1985 | gas phase; Entropy change calculated or estimated; M |
Free energy of reaction
ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
15. | 294. | PHPMS | Deakyne and Meot-Ner (Mautner), 1985 | gas phase; Entropy change calculated or estimated; M |
By formula: Co+ + C2H4 = (Co+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 186. ± 9.2 | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
179. (+7.1,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M | |
27. (+13.,-0.) | CID | Haynes and Armentrout, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
By formula: C2H5Cl = C2H4 + HCl
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 92.0 | kJ/mol | Eqk | Levanova, Bushneva, et al., 1979 | liquid phase; ALS |
ΔrH° | 71.5 | kJ/mol | Eqk | Levanova, Bushneva, et al., 1979 | gas phase; ALS |
ΔrH° | 72.6 ± 2.1 | kJ/mol | Eqk | Howlett, 1955 | gas phase; ALS |
ΔrH° | 71.5 | kJ/mol | Eqk | Lane, Linnett, et al., 1953 | gas phase; ALS |
By formula: Cr+ + C2H4 = (Cr+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 96. ± 11. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
125. (+19.,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
By formula: Ni+ + C2H4 = (Ni+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 182. ± 11. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
138. (+19.,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
By formula: Cu+ + C2H4 = (Cu+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 176. ± 14. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
95. (+11.,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
By formula: Sc+ + C2H4 = (Sc+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 220. ± 10. | kJ/mol | PDiss | Ranashinge and Freiser, 1992 | gas phase; M |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
131. | CID | Armentrout and Kickel, 1994 | gas phase; ΔrH >=, guided ion beam CID; M |
By formula: La+ + C2H4 = (La+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 220. ± 10. | kJ/mol | PDiss | Ranashinge and Freiser, 1992 | gas phase; M |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
90.0 | CID | Armentrout and Kickel, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
By formula: Y+ + C2H4 = (Y+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 220. ± 10. | kJ/mol | PDiss | Ranashinge and Freiser, 1992 | gas phase; M |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
109. | CID | Armentrout and Kickel, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
By formula: Ti+ + C2H4 = (Ti+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 146. ± 11. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
119. | CID | Armentrout and Kickel, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
By formula: V+ + C2H4 = (V+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 125. ± 7.9 | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
117. | CID | Armentrout and Kickel, 1994 | gas phase; ΔrH>=, guided ion beam CID; M |
By formula: Fe+ + C2H4 = (Fe+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 145. ± 11. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
145. (+5.9,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M |
By formula: C2H4 + Br2 = C2H4Br2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -120.9 ± 1.3 | kJ/mol | Cm | Conn, Kistiakowsky, et al., 1938 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -121.6 ± 1.3 kJ/mol; At 355 °K; ALS |
By formula: C2H4 + I2 = C2H4I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -48.1 ± 0.8 | kJ/mol | Eqk | Abrams and Davis, 1954 | gas phase; ALS |
ΔrH° | -56. ± 2. | kJ/mol | Eqk | Cutherbertson and Kistiakowsky, 1935 | gas phase; Heat of dissociation; ALS |
By formula: (Ag+ • C2H4) + C2H4 = (Ag+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 136. | kJ/mol | HPMS | Guo and Castleman, 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 126. | J/mol*K | HPMS | Guo and Castleman, 1991 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -136. ± 2. | kJ/mol | Chyd | Kistiakowsky and Nickle, 1951 | gas phase; ALS |
ΔrH° | -136.3 ± 0.3 | kJ/mol | Chyd | Kistiakowsky, Romeyn, et al., 1935, 2 | gas phase; ALS |
By formula: C2H5Br = HBr + C2H4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 80.3 ± 2.1 | kJ/mol | Eqk | Lane, Linnett, et al., 1953 | gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 79.9 kJ/mol; ALS |
By formula: C3H9Si+ + C2H4 = (C3H9Si+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 98.7 | kJ/mol | PHPMS | Li and Stone, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 161. | J/mol*K | PHPMS | Li and Stone, 1989 | gas phase; M |
By formula: C2H4+ + C2H4 = (C2H4+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 66.1 | kJ/mol | PI | Ono, Linn, et al., 1984 | gas phase; M |
ΔrH° | 76.1 | kJ/mol | PI | Ceyer, Tiedemann, et al., 1979 | gas phase; M |
C6H4FeO4 (l) = 4 (g) + (cr) + (g)
By formula: C6H4FeO4 (l) = 4CO (g) + Fe (cr) + C2H4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 192.5 ± 8.4 | kJ/mol | HAL-HFC | Brown, Connor, et al., 1976 | MS |
ΔrH° | 185.4 | kJ/mol | TD-HFC | Brown, Connor, et al., 1976 | MS |
By formula: C8H12 = C6H8 + C2H4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 136. | kJ/mol | Kin | Huybrechts, Rigaux, et al., 1980 | gas phase; Diels-Alder addition at 560°K, see Van Mele, Boon, et al., 1986; ALS |
By formula: F- + C2H4 = (F- • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 25. ± 13. | kJ/mol | IMRB | Sullivan and Beauchamp, 1976 | gas phase; Structure: Roy and McMahon, 1985; B |
By formula: Rh+ + C2H4 = (Rh+ • C2H4)
Enthalpy of reaction
ΔrH° (kJ/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
161. (+3.,-0.) | CID | Chen and Armetrout, 1995 | gas phase; guided ion beam CID; M |
C7H9Cl2NPd (solution) + (l) = (PdCl2(C5H5N)2) (solution) + (solution)
By formula: C7H9Cl2NPd (solution) + C4H4N2 (l) = (PdCl2(C5H5N)2) (solution) + C2H4 (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -57.7 ± 1.7 | kJ/mol | RSC | Partenheimer and Durham, 1974 | solvent: Dichloromethane; MS |
(solution) + (solution) = C13H19O2Rh (solution) + 2 (solution)
By formula: C9H15O2Rh (solution) + C8H12 (solution) = C13H19O2Rh (solution) + 2C2H4 (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -9.0 ± 0.4 | kJ/mol | RSC | Jesse, Cordfunke, et al., 1979 | solvent: n-Heptane; MS |
(g) + C2H3BrMg (solution) = (solution) + Br2Mg (solution)
By formula: HBr (g) + C2H3BrMg (solution) = C2H4 (solution) + Br2Mg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -294.1 ± 2.2 | kJ/mol | RSC | Holm, 1981 | solvent: Tetrahydrofuran; MS |
By formula: C6HCrO6+ + C2H4 = (C6HCrO6+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 59.8 ± 5.0 | kJ/mol | ICRCD | Hop and McMahon, 1991 | gas phase; Ar collision gas; M |
By formula: Al+ + C2H4 = (Al+ • C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 54.4 ± 8.4 | kJ/mol | CIDC,EqG | Stockigt, Schwarz, et al., 1996 | Anchored to theory; RCD |
(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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 54.0 ± 8.8 | kJ/mol | N/A | DePuy, Gronert, et al., 1989 | gas phase; B |
By formula: H2 + C2H3Cl = C2H4 + HCl
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -76.94 | kJ/mol | Chyd | Lacher, Kianpour, et al., 1956 | gas phase; At 298 K; ALS |
By formula: C2H4 + Cl2 = C2H4Cl2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -182.6 ± 0.63 | kJ/mol | Cm | Conn, Kistiakowsky, et al., 1938 | gas phase; At 355 °K; ALS |
By formula: C2H4ClI = I + Cl + C2H4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 320. ± 4.2 | kJ/mol | Kin | Minton, Felder, et al., 1984 | gas phase; ALS |
By formula: (C2H4+ • C2H4) + C2H4 = (C2H4+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 18. | kJ/mol | PI | Ceyer, Tiedemann, et al., 1979 | gas phase; M |
C12H14Mo (cr) + (cr) = C10H10I2Mo (cr) + (g)
By formula: C12H14Mo (cr) + I2 (cr) = C10H10I2Mo (cr) + C2H4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -163.0 ± 2.1 | kJ/mol | RSC | Calhorda, Carrondo, et al., 1991 | MS |
By formula: C9H15O2Rh (cr) + 2CO (g) = C7H7O4Rh (cr) + 2C2H4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -53.6 ± 1.7 | kJ/mol | DSC | Jesse, Baks, et al., 1978 | MS |
C9H15IrO2 (cr) + 2 (g) = C7H7IrO4 (cr) + 2 (g)
By formula: C9H15IrO2 (cr) + 2CO (g) = C7H7IrO4 (cr) + 2C2H4 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -74.1 ± 4.6 | kJ/mol | DSC | Jesse, Baks, et al., 1978 | MS |
By formula: (Fe+ • C2H4) + C2H4 = (Fe+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 151. ± 15. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
By formula: (Cr+ • C2H4) + C2H4 = (Cr+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 108. ± 11. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
By formula: (Mn+ • C2H4) + C2H4 = (Mn+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 88. ± 14. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
By formula: (V+ • C2H4) + C2H4 = (V+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 127. ± 14. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
By formula: (Ni+ • C2H4) + C2H4 = (Ni+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 173. ± 14. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
By formula: (Co+ • C2H4) + C2H4 = (Co+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 152. ± 14. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
By formula: (Cu+ • C2H4) + C2H4 = (Cu+ • 2C2H4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 174. ± 13. | kJ/mol | CIDT | Sievers, Jarvis, et al., 1998 | RCD |
By formula: C7H10 = C5H6 + C2H4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 97.2 ± 2.5 | kJ/mol | Eqk | Walsh and Wells, 1976 | gas phase; ALS |
By formula: 2C2H4 = C4H8
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -86.6 ± 4.2 | kJ/mol | Eqk | Quick, Knecht, et al., 1972 | gas phase; At 750 K; ALS |
By formula: C2H4I2 = C2H4 + I2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 48.1 ± 0.8 | kJ/mol | Eqk | Benson and Amano, 1962 | gas phase; ALS |
By formula: C4H8 + C2H4 = C6H12
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -69.9 | kJ/mol | Eqk | Scacchi and Back, 1977 | liquid phase; ALS |
Henry's Law data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Vibrational and/or electronic energy levels, Gas Chromatography, 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: Rolf Sander
Henry's Law constant (water solution)
kH(T) = k°H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
k°H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)
k°H (mol/(kg*bar)) | d(ln(kH))/d(1/T) (K) | Method | Reference | Comment |
---|---|---|---|---|
0.0048 | Q | N/A | missing citation give several references for the Henry's law constants but don't assign them to specific species. | |
0.0049 | Q | N/A | Several references are given in the list of Henry's law constants but not assigned to specific species. | |
0.0047 | L | N/A | ||
0.0047 | 1800. | L | N/A | |
0.0047 | V | N/A | ||
0.0049 | X | N/A | The value is taken from the compilation of solubilities by W. Asman (unpublished). |
Vibrational and/or electronic energy levels
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Takehiko Shimanouchi
Symmetry: D2h Symmetry Number σ = 4
Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
---|---|---|---|---|---|---|---|---|---|---|
Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
ag | 1 | CH2 s-str | 3026 | B | ia | 3026.4 p | gas | |||
ag | 2 | CC str | 1623 | D | ia | 1622.6 p | gas | FR(2ν10) | ||
ag | 3 | CH2 scis | 1342 | B | ia | 1342.2 p | gas | |||
au | 4 | CH2 twist | 1023 | E | ia | ia | OC(ν4+ν6) | |||
b1g | 5 | CH2 a-str | 3103 | B | ia | 3102.5 dp | gas | |||
b1g | 6 | CH2 rock | 1236 | C | ia | 1236 dp | liq. | |||
b1u | 7 | CH2 wag | 949 | A | 949.3 M | gas | ia | |||
b2g | 8 | CH2 wag | 943 | C | ia | 943 dp | liq. | |||
b2u | 9 | CH2 a-str | 3106 | B | 3105.5 S | gas | ia | |||
b2u | 10 | CH2 rock | 826 | A | 826.0 W | gas | ia | |||
b3u | 11 | CH2 s-str | 2989 | A | 2988.66 S | gas | ia | |||
b3u | 12 | CH2 scis | 1444 | B | 1443.5 S | gas | ia | |||
Source: Shimanouchi, 1972
Notes
S | Strong |
M | Medium |
W | Weak |
ia | Inactive |
p | Polarized |
dp | Depolarized |
FR | Fermi resonance with an overtone or a combination tone indicated in the parentheses. |
OC | Frequency estimated from an overtone or a combination tone indicated in the parentheses. |
A | 0~1 cm-1 uncertainty |
B | 1~3 cm-1 uncertainty |
C | 3~6 cm-1 uncertainty |
D | 6~15 cm-1 uncertainty |
E | 15~30 cm-1 uncertainty |
Gas Chromatography
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Vibrational and/or electronic energy levels, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | OV-1 | 20. | 166. | Nijs and Jacobs, 1981 | He; Column length: 150. m; Column diameter: 0.50 mm |
Capillary | Squalane | 40. | 175. | Matukuma, 1969 | N2; Column length: 91.4 m; Column diameter: 0.25 mm |
Packed | Squalane | 27. | 177. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 49. | 177. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 67. | 178. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 86. | 178. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Petrocol DH-100 | 178.1 | Haagen-Smit Laboratory, 1997 | He; Column length: 100. m; Column diameter: 0.2 mm; Program: 5C(10min) => 5C/min => 50C(48min) => 1.5C/min => 195C(91min) |
Capillary | DB-1 | 164. | Hoekman, 1993 | 60. m/0.32 mm/1.0 μm, He; Program: -40 C for 12 min; -40 - 125 C at 3 deg.min; 125-185 C at 6 deg/min; 185 - 220 C at 20 deg/min; hold 220 C for 2 min |
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Chromosorb 101 | 183. | Voorhees, Hileman, et al., 1975 | 10. K/min; Tstart: 0. C; Tend: 220. C |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Petrocol DH | 158. | Supelco, 2012 | 100. m/0.25 mm/0.50 μm, Helium, 20. C @ 15. min, 15. K/min, 220. C @ 30. min |
Capillary | OV-101 | 166. | Zenkevich, 2005 | 25. m/0.20 mm/0.10 μm, N2/He, 6. K/min; Tstart: 50. C; Tend: 250. C |
Capillary | OV-101 | 165. | Chupalov and Zenkevich, 1996 | N2, 3. K/min; Column length: 52. m; Column diameter: 0.26 mm; Tstart: 50. C; Tend: 220. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Methyl Silicone | 178. | Chen and Feng, 2007 | Program: not specified |
Capillary | Porapack Q | 180. | Zenkevich and Rodin, 2004 | Program: not specified |
Capillary | Methyl Silicone | 166. | Zenkevich, 2000 | Program: not specified |
Capillary | SPB-1 | 165. | Flanagan, Streete, et al., 1997 | 60. m/0.53 mm/5. μm, He; Program: 40C(6min) => 5C/min => 80C => 10C/min => 200C |
Capillary | Polydimethyl siloxanes | 165. | Zenkevich, 1997 | Program: not specified |
Capillary | Polydimethyl siloxanes | 165. | Zenkevich, Chupalov, et al., 1996 | Program: not specified |
Capillary | SPB-1 | 165. | Strete, Ruprah, et al., 1992 | 60. m/0.53 mm/5.0 μm, Helium; Program: 40 0C (6 min) 5 0C/min -> 80 0C 10 0C/min -> 200 0C |
Packed | SE-30 | 188. | Robinson and Odell, 1971 | N2, Chromosorb W; Column length: 6.1 m; Program: 50C910min) => 20C/min => 90(6min) => 10C/min => 150C(hold) |
Packed | Squalane | 180. | Robinson and Odell, 1971 | N2, Embacel; Column length: 3.0 m; Program: 25C(5min) => 2C/min => 35 => 4C/min => 95C(hold) |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Vibrational and/or electronic energy levels, Gas Chromatography, 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:
Cp,gas Constant pressure heat capacity of gas Cp,liquid Constant pressure heat capacity of liquid Pc Critical pressure Ptriple Triple point pressure S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid Entropy of liquid at standard conditions T Temperature Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature Vc Critical volume d(ln(kH))/d(1/T) Temperature dependence parameter for Henry's Law constant k°H Henry's Law constant at 298.15K ΔcH°gas Enthalpy of combustion of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions ΔsubH Enthalpy of sublimation ΔvapH Enthalpy of vaporization ΔvapS Entropy of vaporization ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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