3-Heptyne

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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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas82.8 ± 2.4kJ/molChydRogers, Dagdagan, et al., 1979 

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

Quantity Value Units Method Reference Comment
Tboil378. to 379.KN/AFarchan Laboratories, 1990BS
Tboil380.4KN/AWeast and Grasselli, 1989BS
Tboil380.31KN/AAnonymous, 1948Uncertainty assigned by TRC = 0.3 K; TRC
Tboil379.KN/ALespieau and Wiemann, 1929Uncertainty assigned by TRC = 2. K; TRC
Tboil379.65KN/ABourguel, 1925Uncertainty assigned by TRC = 2. K; TRC
Quantity Value Units Method Reference Comment
Tfus170.KN/ACampbell and Eby, 1941Uncertainty assigned by TRC = 2. K; TRC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
39.1358.AStephenson and Malanowski, 1987Based on data from 343. to 380. K. See also Eisen and Orav, 1970 and Boublik, Fried, et al., 1984.; AC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Gas phase ion energetics 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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

View reactions leading to C7H12+ (ion structure unspecified)

Ionization energy determinations

IE (eV) Method Reference Comment
9.260 ± 0.005PECarlier, Dubois, et al., 1975LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C5H7+9.6C2H5EIWagner-Redeker, Levsen, et al., 1981LLK
C6H9+9.7CH3EIWagner-Redeker, Levsen, et al., 1981LLK

References

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

Rogers, Dagdagan, et al., 1979
Rogers, D.W.; Dagdagan, O.A.; Allinger, N.L., Heats of hydrogenation and formation of linear alkynes and a molecular mechanics interpretation, J. Am. Chem. Soc., 1979, 101, 671-676. [all data]

Farchan Laboratories, 1990
Farchan Laboratories, Research Chemicals Catalog, Farchan Laboratories, Gainesville, FL, 1990, 91. [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, 1948
Anonymous, R., , Am. Pet. Inst. Res. Proj. 6, Natl. Bur. Stand., 1948. [all data]

Lespieau and Wiemann, 1929
Lespieau, R.; Wiemann, Use of substituted epidibromohydrines in the preparation of acetylene hydrocarbons hexene and gamma-hexine, Bull. Soc. Chim. Fr., 1929, 45, 627-635. [all data]

Bourguel, 1925
Bourguel, M., Ann. Chim. (Paris), 1925, 3, 325. [all data]

Campbell and Eby, 1941
Campbell, K.N.; Eby, L.T., The preparation of higher cis and trans olefins, J. Am. Chem. Soc., 1941, 63, 216. [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]

Eisen and Orav, 1970
Eisen, O.; Orav, A., Eesti NSV Tead. Akad. Toim. Keem. Geol., 1970, 19, 3, 202. [all data]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]

Carlier, Dubois, et al., 1975
Carlier, P.; Dubois, J.E.; Masclet, P.; Mouvier, G., Spectres de photoelectrons des alcynes, J. Electron Spectrosc. Relat. Phenom., 1975, 7, 55. [all data]

Wagner-Redeker, Levsen, et al., 1981
Wagner-Redeker, W.; Levsen, K.; Schwarz, H.; Zummack, W., Gaseous alkyne ions, J. Am. Chem. Soc., 1981, 16, 361. [all data]


Notes

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