Methane, tribromo-

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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
Δfgas55.4 ± 3.3kJ/molCcrPapina, Kolesov, et al., 1982 

Phase change data

Go To: Top, Gas 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil422. ± 2.KAVGN/AAverage of 13 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus279. ± 10.KAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple281.84KN/AGolovanova and Kolesov, 1984Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Δvap46.06kJ/molN/AMajer and Svoboda, 1985 
Δvap46.05 ± 0.10kJ/molCLaynez and Wadso, 1972ALS
Δvap46.1 ± 0.1kJ/molCLaynez, Wadsö, et al., 1972AC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
39.66422.3N/AMajer and Svoboda, 1985 
42.3335.EBBoublík and Aim, 1972Based on data from 320. to 412. K. See also Kudchadker, Kudchadker, et al., 1979.; AC
44.0318.N/AKireev and Sitnikov, 1941Based on data from 303. to 373. K. See also Boublik, Fried, et al., 1984.; AC

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
303. to 374.03.915411363.237-73.148Simnikov, 1941Coefficents calculated by NIST from author's data.

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
11.046281.84Golovanova and Kolesov, 1984, 2DH
11.09281.5Kafarov, Dorokhov, et al., 1987AC

Entropy of fusion

ΔfusS (J/mol*K) Temperature (K) Reference Comment
39.2281.84Golovanova and Kolesov, 1984, 2DH

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 evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
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
LL - Sharon G. Lias and Joel F. Liebman

Quantity Value Units Method Reference Comment
IE (evaluated)10.50 ± 0.02eVN/AN/AL

Ionization energy determinations

IE (eV) Method Reference Comment
10.5PEVon Niessen, Asbrink, et al., 1982LBLHLM
10.7 ± 0.3EIKaposi, Riedel, et al., 1976LLK
10.48 ± 0.02PITsai, Baer, et al., 1975LLK
10.51 ± 0.02PIWatanabe, Nakayama, et al., 1962RDSH
10.47PENicholson and Rademacher, 1974Vertical value; LLK
10.47PEDixon, Murrell, et al., 1971Vertical value; LLK
10.47PEPotts, Lempka, et al., 1970Vertical value; RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
Br+15.4 ± 0.4CHBr2EIKaposi, Riedel, et al., 1976LLK
HBr+14.7 ± 0.3CBr2EIKaposi, Riedel, et al., 1976LLK
Br2+15.1 ± 0.3CHBrEIKaposi, Riedel, et al., 1976LLK
C+23.6 ± 0.5H+3BrEIKaposi, Riedel, et al., 1976LLK
C+23.55 ± 0.05?EIReed and Snedden, 1956RDSH
CBr+16.2 ± 0.4HBr+BrEIKaposi, Riedel, et al., 1976LLK
CBr2+13.7 ± 0.2HBrEIKaposi, Riedel, et al., 1976LLK
CBr3+13.0 ± 0.3HEIKaposi, Riedel, et al., 1976LLK
CH+20.5 ± 0.53BrEIKaposi, Riedel, et al., 1976LLK
CH+21.70 ± 0.05?EIReed and Snedden, 1956RDSH
CHBr+17.4 ± 0.42BrEIKaposi, Riedel, et al., 1976LLK
CHBr2+10.53BrEIHolmes, Lossing, et al., 1988LL
CHBr2+10.70 ± 0.02BrPITsai, Baer, et al., 1975LLK
CHBr2+10.80 ± 0.01BrEIReed and Snedden, 1956RDSH

De-protonation reactions

CBr3- + Hydrogen cation = Methane, tribromo-

By formula: CBr3- + H+ = CHBr3

Quantity Value Units Method Reference Comment
Δr1463. ± 9.2kJ/molG+TSBorn, Ingemann, et al., 2000gas phase; B
Quantity Value Units Method Reference Comment
Δr1431. ± 8.4kJ/molIMREBorn, Ingemann, et al., 2000gas phase; B

References

Go To: Top, Gas phase thermochemistry data, Phase change 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.

Papina, Kolesov, et al., 1982
Papina, T.S.; Kolesov, V.P.; Golovanova, Yu.G., The standard enthalpy of formation of bromoform, Russ. J. Phys. Chem. (Engl. Transl.), 1982, 56, 1666-1668. [all data]

Golovanova and Kolesov, 1984
Golovanova, Y.G.; Kolesov, V.P., Enthalpies of melting, melting temperatures, and cryoscopic constants of some haloorganic compounds, Vestn. Mosk. Univ., Ser. 2: Khim., 1984, 25, 244. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Laynez and Wadso, 1972
Laynez, J.; Wadso, I., Enthalpies of vaporization of organic compounds. IX. Some halogen substituted hydrocarbons and esters, Acta Chem. Scand., 1972, 26, 3148. [all data]

Laynez, Wadsö, et al., 1972
Laynez, José; Wadsö, Ingemar; Haug, Arne; Songstad, J.; Pilotti, Åke, Enthalpies of Vaporization of Organic Compounds. IX. Some Halogen Substituted Hydrocarbons and Esters., Acta Chem. Scand., 1972, 26, 3148-3152, https://doi.org/10.3891/acta.chem.scand.26-3148 . [all data]

Boublík and Aim, 1972
Boublík, T.; Aim, K., Heats of vaporization of simple non-spherical molecule compounds, Collect. Czech. Chem. Commun., 1972, 37, 11, 3513-3521, https://doi.org/10.1135/cccc19723513 . [all data]

Kudchadker, Kudchadker, et al., 1979
Kudchadker, A.P.; Kudchadker, S.A.; Shukla, R.P.; Patnaik, P.R., Vapor pressures and boiling points of selected halomethanes, J. Phys. Chem. Ref. Data, 1979, 8, 2, 499, https://doi.org/10.1063/1.555600 . [all data]

Kireev and Sitnikov, 1941
Kireev, V.A.; Sitnikov, I.P., Russ. J. Appl. Chem., 1941, 14, 483. [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]

Simnikov, 1941
Simnikov, I.P., Increase of Enthalpy During Formation of Azeotropic Mixtures, Zh. Obshch. Khim., 1941, 14, 483-492. [all data]

Golovanova and Kolesov, 1984, 2
Golovanova, Yu.G.; Kolesov, V.P., Enthalpies of melting, melting temperatures, and cryoscopic constants of some haloorganic compounds, Vestn. Mosk Univ., Ser. 2: Khim., 1984, 25(3), 244-248. [all data]

Kafarov, Dorokhov, et al., 1987
Kafarov, V.V.; Dorokhov, I.N.; Vetokhin, V.N.; Volkov, L.P., Dokl. Phys. Chem., 1987, 298, 77. [all data]

Von Niessen, Asbrink, et al., 1982
Von Niessen, W.; Asbrink, L.; Bieri, G., 30.4 nm He(II) Photoelectron spectra of organic molecules. Part VI. Halogeno-compounds (C,H,X: X = Cl, Br, I), J. Electron Spectrosc. Relat. Phenom., 1982, 26, 173. [all data]

Kaposi, Riedel, et al., 1976
Kaposi, O.; Riedel, M.; Vass-Balthazar, K.; Sanchez, G.R.; Lelik, L., Mass-spectrometric determination of thermochemical data of CHBr3 and CBr4 by study of their electron impact and heterogeneous pyrolytic decompositions, Acta Chim. Acad. Sci. Hung., 1976, 89, 221. [all data]

Tsai, Baer, et al., 1975
Tsai, B.P.; Baer, T.; Werner, A.S.; Lin, S.F., A photoelectron-photoion coincidence study of the ionization and fragment appearance potentials of bromo- and iodomethanes, J. Phys. Chem., 1975, 79, 570. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Nicholson and Rademacher, 1974
Nicholson, D.G.; Rademacher, P., Photoelectron spectra and electronic structures of antimony(III) halides, Acta Chem. Scand. Ser. A:, 1974, 28, 1136. [all data]

Dixon, Murrell, et al., 1971
Dixon, R.N.; Murrell, J.N.; Narayan, B., The photoelectron spectra of the halomethanes, Mol. Phys., 1971, 20, 611. [all data]

Potts, Lempka, et al., 1970
Potts, A.W.; Lempka, H.J.; Streets, D.G.; Price, W.C., Photoelectron spectra of the halides of elements in groups III, IV, V and VI, Phil. Trans. Roy. Soc. (London), 1970, A268, 59. [all data]

Reed and Snedden, 1956
Reed, R.I.; Snedden, W., Studies in electron impact methods. Part 6.-The formation of the methine and carbon ions, J. Chem. Soc. Faraday Trans., 1956, 55, 876. [all data]

Holmes, Lossing, et al., 1988
Holmes, J.L.; Lossing, F.P.; McFarlane, R.A., Stabilization energy and positional effects in halogen-substituted alkyl ions., Int. J. Mass Spectrom. Ion Phys., 1988, 86, 209. [all data]

Born, Ingemann, et al., 2000
Born, M.; Ingemann, S.; Nibbering, N.M.M., Thermochemical properties of halogen-substituted methanes, methyl radicals, and carbenes in the gas phase, Int. J. Mass Spectrom., 2000, 194, 2-3, 103-113, https://doi.org/10.1016/S1387-3806(99)00125-6 . [all data]


Notes

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