2-Norbornene
- Formula: C7H10
- Molecular weight: 94.1543
- IUPAC Standard InChIKey: JFNLZVQOOSMTJK-UHFFFAOYSA-N
- CAS Registry Number: 498-66-8
- 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. - Other names: Bicyclo[2.2.1]hept-2-ene; Bicyclo[2.2.1]heptene; Norbornene; Norbornylene; Norcamphene; Norfenchene; 2-Norbornylene; 3,6-Endomethylenecyclohexene; Bicyclo[2.2.1]-2-heptene; NSC 120425; 8,9,10-trinorborn-2-ene
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Gas phase thermochemistry data
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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 as indicated in comments:
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 | 21. ± 7. | kcal/mol | AVG | N/A | Average of 8 values; Individual data points |
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
26.94 | 298.15 | Walsh R., 1975 | Two sets of calculated functions are given by [ Walsh R., 1976] for two vibrational assignments. The difference between the two sets is about 8 J/mol*K for S(T) values. S(298.15 K) recommended here is in good agreement with value obtained from detail force field calculation [ Lenz T.G., 1989].; GT |
27.15 | 300. | ||
37.55 | 400. | ||
46.34 | 500. | ||
53.47 | 600. | ||
59.30 | 700. | ||
64.10 | 800. | ||
68.16 | 900. | ||
71.58 | 1000. |
Condensed phase thermochemistry data
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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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | 7.09 ± 0.40 | kcal/mol | Ccb | Hall, Smith, et al., 1973 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -1007.0 ± 0.4 | kcal/mol | Ccb | Hall, Smith, et al., 1973 | Corresponding ΔfHºliquid = 7.11 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔfH°solid | 10.62 ± 0.48 | kcal/mol | Ccr | Steele, Chirico, et al., 1996 | Hfusion=3.2±0.2 kJ/mol; ALS |
ΔfH°solid | 12.8 ± 0.76 | kcal/mol | Ccb | Steele, 1978 | ALS |
ΔfH°solid | 9.89 ± 0.33 | kcal/mol | Ccb | Kozina, Bychikhina, et al., 1976 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -1010.55 ± 0.47 | kcal/mol | Ccr | Steele, Chirico, et al., 1996 | Hfusion=3.2±0.2 kJ/mol; Corresponding ΔfHºsolid = 10.62 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°solid | -1012.7 ± 0.76 | kcal/mol | Ccb | Steele, 1978 | Corresponding ΔfHºsolid = 12.8 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°solid | -1009.83 ± 0.32 | kcal/mol | Ccb | Kozina, Bychikhina, et al., 1976 | Corresponding ΔfHºsolid = 9.90 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of solid
Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
31.05 | 298.15 | Steele, 1978 | DH |
31.05 | 297. | Hall, Smith, et al., 1973 | DH |
Phase change data
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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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 369.2 | K | N/A | Weast and Grasselli, 1989 | BS |
Tboil | 368.87 | K | N/A | Anonymous, 1942 | Uncertainty assigned by TRC = 0.3 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 319. | K | N/A | Lebedev, Smirnova, et al., 1992 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.1 K; TRC |
Tfus | 317. to 317.6 | K | N/A | Buckingham and Donaghy, 1982 | BS |
Tfus | 318.9 | K | N/A | Anonymous, 1942 | Uncertainty assigned by TRC = 0.2 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 319.5 | K | N/A | Steele, Chirico, et al., 1996 | Uncertainty assigned by TRC = 1. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 590. | K | N/A | Steele, Chirico, et al., 1996 | Uncertainty assigned by TRC = 2. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 47.96 | atm | N/A | Steele, Chirico, et al., 1996 | Uncertainty assigned by TRC = 2.47 atm; from extraploation of obs. vapor pressures to Tc; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 3.181 | mol/l | N/A | Steele, Chirico, et al., 1996 | Uncertainty assigned by TRC = 0.15 mol/l; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 8.39 ± 0.05 | kcal/mol | EB | Steele, Chirico, et al., 1996 | Based on data from 338. to 406. K.; AC |
ΔvapH° | 8.03 ± 0.02 | kcal/mol | V | Hall, Smith, et al., 1973 | ALS |
ΔvapH° | 8.03 | kcal/mol | N/A | Hall, Smith, et al., 1973 | DRB |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 9.1 ± 0.2 | kcal/mol | AVG | N/A | Average of 10 values; Individual data points |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
367. to 370. | 0.974 | Buckingham and Donaghy, 1982 | BS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
7.89 ± 0.05 | 340. | EB | Steele, Chirico, et al., 1996 | Based on data from 338. to 406. K.; AC |
7.36 ± 0.07 | 380. | EB | Steele, Chirico, et al., 1996 | Based on data from 338. to 406. K.; AC |
8.20 | 316. | A | Stephenson and Malanowski, 1987 | Based on data from 301. to 350. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
0.832 | 319.5 | Lebedev, Smirnova, et al., 1992, 2 | See also Smirnova, Lebedev, et al., 1992.; AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
7.832 | 130.3 | Lebedev, Vasil'yev, et al., 1993 | CAL |
2.603 | 319.5 |
Reaction thermochemistry data
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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 as indicated in comments:
B - John E. Bartmess
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.
Individual Reactions
By formula: C7H9- + H+ = C7H10
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 402.1 ± 3.1 | kcal/mol | G+TS | Lee and Squires, 1986 | gas phase; Between NH3, EtNH2. Assigned as vinylic site by authors.; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 393.9 ± 3.0 | kcal/mol | IMRB | Lee and Squires, 1986 | gas phase; Between NH3, EtNH2. Assigned as vinylic site by authors.; B |
By formula: H2 + C7H10 = C7H12
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -32.8 ± 0.1 | kcal/mol | Chyd | Doering, Roth, et al., 1988 | gas phase; ALS |
ΔrH° | -33.82 ± 0.28 | kcal/mol | Chyd | Rogers, Choi, et al., 1980 | liquid phase; solvent: Hexane; Author was aware that data differs from previously reported values; ALS |
ΔrH° | -33.13 ± 0.21 | kcal/mol | Chyd | Turner, Meador, et al., 1957 | liquid phase; solvent: Acetic acid; ALS |
By formula: C7H10 + C2HF3O2 = C9H11F3O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -15.333 ± 0.055 | kcal/mol | Cac | Wiberg, Wasserman, et al., 1985 | liquid phase; solvent: Trifluoroacetic acid; Trifluoroacetolysis; ALS |
By formula: C7H10 + HCl = C7H11Cl
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -16.94 ± 0.37 | kcal/mol | Cm | Arnett and Pienta, 1980 | liquid phase; solvent: Methylene chloride; Hydrochlorination; ALS |
By formula: C7H10 = C5H6 + C2H4
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 23.2 ± 0.60 | kcal/mol | Eqk | Walsh and Wells, 1976 | gas phase; ALS |
Gas Chromatography
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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: 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-101 | 100. | 731. | Diez, Guillen, et al., 1990 | N2; Column length: 25. m; Column diameter: 0.23 mm |
Capillary | OV-101 | 80. | 726. | Diez, Guillen, et al., 1990 | N2; Column length: 25. m; Column diameter: 0.23 mm |
Capillary | Squalane | 100. | 721.2 | Diez, Guillen, et al., 1990 | N2; Column length: 45. m; Column diameter: 0.5 mm |
Capillary | Squalane | 80. | 714.6 | Diez, Guillen, et al., 1990 | N2; Column length: 45. m; Column diameter: 0.5 mm |
Capillary | SE-54 | 100. | 741.1 | Diez, Guillen, et al., 1990 | N2; Column length: 25. m; Column diameter: 0.22 mm |
Capillary | SE-54 | 80. | 735.2 | Diez, Guillen, et al., 1990 | N2; Column length: 25. m; Column diameter: 0.22 mm |
Capillary | OV-101 | 100. | 731. | Bermejo, Blanco, et al., 1987 | N2; Column length: 25. m; Column diameter: 0.23 mm |
Capillary | OV-101 | 80. | 726. | Bermejo, Blanco, et al., 1987 | N2; Column length: 25. m; Column diameter: 0.23 mm |
Capillary | Squalane | 40. | 706.7 | Stopp, Engewald, et al., 1978 | Column length: 70. m; Column diameter: 0.23 mm |
Packed | Squalane | 27. | 704. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 49. | 710. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 67. | 715. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Packed | Squalane | 86. | 720. | Hively and Hinton, 1968 | He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | PONA | 699. | Zhang, Ding, et al., 2009 | 50. m/0.20 mm/0.50 μm, Nitrogen, 35. C @ 15. min, 2. K/min, 200. C @ 10. min |
Capillary | OV-101 | 727. | Orav, Kailas, et al., 1999 | 50. m/0.20 mm/0.50 μm, Helium, 30. C @ 6. min, 1. K/min; Tend: 100. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Squalane | 716. | Chen, 2008 | Program: not specified |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Walsh R., 1975
Walsh R.,
The enthalpy of formation of bicyclo[2.2.1]hepta-2,5-diene. Thermodynamic functions of bicyclo[2.2.1]heptane and bicyclo[2.2.1]hepta-2,5-diene,
J. Chem. Thermodyn., 1975, 7, 149-154. [all data]
Walsh R., 1976
Walsh R.,
The enthalpy of formation and thermodynamic functions of bicyclo[2.2.1]hept-2-ene,
J. Chem. Thermodyn., 1976, 8, 55-60. [all data]
Lenz T.G., 1989
Lenz T.G.,
Force-field calculations giving accurate conformation, Hf(T), S(T), and Cp(T) for unsaturated acyclic and cyclic hydrocarbons,
J. Phys. Chem., 1989, 93, 1588-1592. [all data]
Hall, Smith, et al., 1973
Hall, H.K., Jr.; Smith, C.D.; Baldt, J.H.,
Enthalpies of formation of norticyclene, norbornene, norbornadiene, and quadricyclane,
J. Am. Chem. Soc., 1973, 95, 3197-3201. [all data]
Steele, Chirico, et al., 1996
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.; Smith, N.K.,
Thermodynamic properties and ideal-gas enthalpies of formation for butyl vinyl ether, 1,2-dimethoxyethane, methyl glycolate, bicyclo[2.2.1]hept-2-ene, 5-vinylbicyclo[2.2.1]hept-2-ene, trans-azobenzene, butyl acrylate, di-tert-butyl ether, and hexane-1,6-diol,
J. Chem. Eng. Data, 1996, 41, 1285-1302. [all data]
Steele, 1978
Steele, W.V.,
The standard enthalpies of formation of a series of C7, bridged-ring hydrocarbons: norbornane, norbornene, nortricyclene, norbornadiene, and quadricyclane,
J. Chem. Thermodyn., 1978, 10, 919-927. [all data]
Kozina, Bychikhina, et al., 1976
Kozina, M.P.; Bychikhina, L.V.; Gal'chenko, G.L.; Mil'vitskaya, E.M.; Ordubadi, M.; Plate, A.F.,
Enthalpies of nortricyclene and norbornene formation,
Dokl. Akad. Nauk SSSR, 1976, 226, 1105-1108. [all data]
Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]
Anonymous, 1942
Anonymous, R.,
, Am. Pet. Inst. Res. Proj. 6, Natl. Bur. Stand., 1942. [all data]
Lebedev, Smirnova, et al., 1992
Lebedev, B.; Smirnova, N.; Kiparisova, Y.; Makovetsky, K.,
Makromol. Chem., 1992, 193, 6, 1399, https://doi.org/10.1002/macp.1992.021930616
. [all data]
Buckingham and Donaghy, 1982
Buckingham, J.; Donaghy, S.M.,
Dictionary of Organic Compounds: Fifth Edition, Chapman and Hall, New York, 1982, 1. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Lebedev, Smirnova, et al., 1992, 2
Lebedev, Boris; Smirnova, Natal'ya; Kiparisova, Yelena; Makovetsky, Kirill,
Makromol. Chem., 1992, 193, 6, 1399-1411, https://doi.org/10.1002/macp.1992.021930616
. [all data]
Smirnova, Lebedev, et al., 1992
Smirnova, N.N.; Lebedev, B.V.; Kiparisova, E.G.; Makovetskii, K.L.; Gorbacheva, L.I.,
Thermodynamics of norbornene, its polymerization, and the formed polynorbornene in the 0-330 K region,
Vysokomol. Soed. A, 1992, 34, 1, 77. [all data]
Lebedev, Vasil'yev, et al., 1993
Lebedev, B.; Vasil'yev, V.; Novosyolova, N.,
Makromol. Chem., 1993, 194, 2, 739, https://doi.org/10.1002/macp.1993.021940231
. [all data]
Lee and Squires, 1986
Lee, R.E.; Squires, R.R.,
Anionic homoaromaticity: A gas phase experimental study,
J. Am. Chem. Soc., 1986, 105, 5078. [all data]
Doering, Roth, et al., 1988
Doering, W.E.; Roth, W.R.; Breuckmann, R.; Figge, L.; Lennartz, H.-W.; Fessner, W.-D.; Prinzbach, F.H.,
Verbotene Reaktionen. - [2 + 2]-Cycloreversion starrer Cyclobutane,
Chem. Ber., 1988, 121, 1-9. [all data]
Rogers, Choi, et al., 1980
Rogers, D.W.; Choi, L.S.; Girellini, R.S.,
Heats of hydrogenation and formation of quadricyclene, norbornadiene, norbornene, and nortricyclene,
J. Phys. Chem., 1980, 84, 1810-1814. [all data]
Turner, Meador, et al., 1957
Turner, R.B.; Meador, W.R.; Winkler, R.E.,
Heats of hydrogenation. I. Apparatus and the heats of hydrogenation of bicyclo[2,2,1]heptene, bicyclo[2,2,1]heptadiene, bicyclo[2,2,2]octene and bicyclo[2,2,2]octadiene,
J. Am. Chem. Soc., 1957, 79, 4116-4121. [all data]
Wiberg, Wasserman, et al., 1985
Wiberg, K.B.; Wasserman, D.J.; Martin, E.J.; Murcko, M.A.,
Enthalpies of hydration of alkenes. 3. Cycloalkenes,
J. Am. Chem. Soc., 1985, 107, 6019-6022. [all data]
Arnett and Pienta, 1980
Arnett, E.M.; Pienta, N.J.,
Stabilities of carbonium ions in solution. 12. Heats of formation of alkyl chlorides as an entree to heats of solvation of aliphatic carbonium ions,
J. Am. Chem. Soc., 1980, 102, 3329-3334. [all data]
Walsh and Wells, 1976
Walsh, R.; Wells, J.M.,
The enthalpy of formation and thermodynamic functions of bicyclo[2,2,1]hept-2-ene,
J. Chem. Thermodyn., 1976, 8, 55-60. [all data]
Diez, Guillen, et al., 1990
Diez, M.A.; Guillen, M.D.; Blanco, C.G.; Bermejo, J.,
Chromatographic study of methylcyclopentadiene dimers and iso-dimers and determination of their boiling points,
J. Chromatogr., 1990, 508, 363-374, https://doi.org/10.1016/S0021-9673(00)91279-2
. [all data]
Bermejo, Blanco, et al., 1987
Bermejo, J.; Blanco, C.G.; Diez, M.A.; Guillén, M.D.,
Kováts retention indices of selected mono and polycyclic olefins,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1987, 10, 8, 461-463, https://doi.org/10.1002/jhrc.1240100809
. [all data]
Stopp, Engewald, et al., 1978
Stopp, I.; Engewald, W.; Kühn, H.; Welsch, Th.,
Molekülstruktur und retentionsverhalten. VIII. Zum gaschromatographischen retentionsverhalten von dicyclopentadienderivaten,
J. Chromatogr., 1978, 147, 21-30, https://doi.org/10.1016/S0021-9673(00)85113-4
. [all data]
Hively and Hinton, 1968
Hively, R.A.; Hinton, R.E.,
Variation of the retention index with temperature on squalane substrates,
J. Gas Chromatogr., 1968, 6, 4, 203-217, https://doi.org/10.1093/chromsci/6.4.203
. [all data]
Zhang, Ding, et al., 2009
Zhang, X.; Ding, L.; Sun, Z.; Song, L.; Sun, T.,
Study on quantitative structure-retention relationships for hydrocarbons in FCC gasoline,
Chromatographia, 2009, 70, 3/4, 511-518, https://doi.org/10.1365/s10337-009-1174-0
. [all data]
Orav, Kailas, et al., 1999
Orav, A.; Kailas, T.; Muurisepp, M.; Kann, J.,
Composition of the oil from waste tires. 1. Fraction boiling at yp to 160 0C,
Proc. Estonian Acad. Sci. Chem., 1999, 48, 1, 30-39. [all data]
Chen, 2008
Chen, H.-F.,
Quantitative prediction of gas chromatography retention indices with support vector machines, radial basis neutral networks and multiple linear regression,
Anal. Chim. Acta, 2008, 609, 1, 24-36, https://doi.org/10.1016/j.aca.2008.01.003
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas Chromatography, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Cp,solid Constant pressure heat capacity of solid Pc Critical pressure Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid 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 ΔsubH° Enthalpy of sublimation at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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