Benzene, 1-iodo-3-methyl-

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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
Δfgas31.9 ± 1.4kcal/molCcbSmith, 1956Heat of formation derived by Cox and Pilcher, 1970

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

Quantity Value Units Method Reference Comment
Δfliquid18.9 ± 1.0kcal/molCcbSmith, 1956Heat of formation derived by Cox and Pilcher, 1970
Quantity Value Units Method Reference Comment
Δcliquid-916.4 ± 1.0kcal/molCcbSmith, 1956Reanalyzed by Cox and Pilcher, 1970, Original value = -915.49 kcal/mol

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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Tboil486.2KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Δvap13.0 ± 1.0kcal/molVSmith, 1956Heat of formation derived by Cox and Pilcher, 1970; ALS

Reduced pressure boiling point

Tboil (K) Pressure (atm) Reference Comment
354.20.013Weast and Grasselli, 1989BS

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 by: John E. Bartmess

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

C7H6I- + Hydrogen cation = Benzene, 1-iodo-3-methyl-

By formula: C7H6I- + H+ = C7H7I

Quantity Value Units Method Reference Comment
Δr372.1 ± 3.1kcal/molG+TSWenthold, Wierschke, et al., 1994gas phase; Between MeCN and FCH2CH2OH
Quantity Value Units Method Reference Comment
Δr365.0 ± 3.0kcal/molIMRBWenthold, Wierschke, et al., 1994gas phase; Between MeCN and FCH2CH2OH

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:
B - John E. Bartmess
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

Ionization energy determinations

IE (eV) Method Reference Comment
8.6 ± 0.1EITajima and Tsuchiya, 1972LLK
8.61 ± 0.03PIWatanabe, Nakayama, et al., 1962RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C5H5+14.5 ± 0.2C2H2+IEITajima and Tsuchiya, 1973LLK
C5H5+14.47 ± 0.15?EITajima and Tsuchiya, 1972LLK
C7H7+10.3 ± 0.20IPIDunbar, Honovich, et al., 1988LL
C7H7+11.0 ± 0.3?EIMcLafferty and Winkler, 1974LLK
C7H7+11.3 ± 0.1?EITajima and Tsuchiya, 1972LLK
C7H7+11.3IEIYeo and Williams, 1970RDSH

De-protonation reactions

C7H6I- + Hydrogen cation = Benzene, 1-iodo-3-methyl-

By formula: C7H6I- + H+ = C7H7I

Quantity Value Units Method Reference Comment
Δr372.1 ± 3.1kcal/molG+TSWenthold, Wierschke, et al., 1994gas phase; Between MeCN and FCH2CH2OH; B
Quantity Value Units Method Reference Comment
Δr365.0 ± 3.0kcal/molIMRBWenthold, Wierschke, et al., 1994gas phase; Between MeCN and FCH2CH2OH; B

References

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

Smith, 1956
Smith, L., Corrected heats of combustion of organic iodine compounds, Acta Chem. Scand., 1956, 10, 884-886. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [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]

Wenthold, Wierschke, et al., 1994
Wenthold, P.G.; Wierschke, S.G.; Nash, J.J.; Squires, R.R., Biradical thermochemistry from collision-induced dissociation threshold energy measurements .2. Experimental and theoretical studies of the Mechanism and Thermochemistry of Formation of alph, J. Am. Chem. Soc., 1994, 116, 16, 7378, https://doi.org/10.1021/ja00095a048 . [all data]

Tajima and Tsuchiya, 1972
Tajima, S.; Tsuchiya, T., The effects of the repeller voltage and the shield voltage on appearance potential measurements by electron impact, Shitsuryo Bunseki, 1972, 20, 117. [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]

Tajima and Tsuchiya, 1973
Tajima, S.; Tsuchiya, T., Energetics consideration of C5H5+ ions produced from various precursors by electron impact, Bull. Chem. Soc. Jpn., 1973, 46, 3291. [all data]

Dunbar, Honovich, et al., 1988
Dunbar, R.C.; Honovich, J.P.; Asamoto, B., Photodissociation thermochemistry as a probe of halotoluene ion potential surfaces, J. Phys. Chem., 1988, 92, 6935. [all data]

McLafferty and Winkler, 1974
McLafferty, F.W.; Winkler, J., Gaseous tropylium, benzyl, tolyl, and norbornadienyl cations, J. Am. Chem. Soc., 1974, 96, 5182. [all data]

Yeo and Williams, 1970
Yeo, A.N.H.; Williams, D.H., Rearrangement in the molecular ions of halogenotoluenes prior to fragmentation in the mass spectrometer, Chem. Commun., 1970, 886. [all data]


Notes

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