Benzene, 1-iodo-3-methyl-
- Formula: C7H7I
- Molecular weight: 218.0350
- IUPAC Standard InChIKey: VLCPISYURGTGLP-UHFFFAOYSA-N
- CAS Registry Number: 625-95-6
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Toluene, m-iodo-; m-Iodotoluene; m-Methyliodobenzene; 3-Iodotoluene; 1-Iodo-3-methylbenzene; 1-Methyl-3-iodobenzene
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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 |
---|---|---|---|---|---|
ΔfH°gas | 31.9 ± 1.4 | kcal/mol | Ccb | Smith, 1956 | Heat 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 |
---|---|---|---|---|---|
ΔfH°liquid | 18.9 ± 1.0 | kcal/mol | Ccb | Smith, 1956 | Heat of formation derived by Cox and Pilcher, 1970 |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -916.4 ± 1.0 | kcal/mol | Ccb | Smith, 1956 | Reanalyzed 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 |
---|---|---|---|---|---|
Tboil | 486.2 | K | N/A | Weast and Grasselli, 1989 | BS |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 13.0 ± 1.0 | kcal/mol | V | Smith, 1956 | Heat of formation derived by Cox and Pilcher, 1970; ALS |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
354.2 | 0.013 | Weast and Grasselli, 1989 | BS |
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- + =
By formula: C7H6I- + H+ = C7H7I
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 372.1 ± 3.1 | kcal/mol | G+TS | Wenthold, Wierschke, et al., 1994 | gas phase; Between MeCN and FCH2CH2OH |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 365.0 ± 3.0 | kcal/mol | IMRB | Wenthold, Wierschke, et al., 1994 | gas 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 ± 0.1 | EI | Tajima and Tsuchiya, 1972 | LLK |
8.61 ± 0.03 | PI | Watanabe, Nakayama, et al., 1962 | RDSH |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C5H5+ | 14.5 ± 0.2 | C2H2+I | EI | Tajima and Tsuchiya, 1973 | LLK |
C5H5+ | 14.47 ± 0.15 | ? | EI | Tajima and Tsuchiya, 1972 | LLK |
C7H7+ | 10.3 ± 0.20 | I | PI | Dunbar, Honovich, et al., 1988 | LL |
C7H7+ | 11.0 ± 0.3 | ? | EI | McLafferty and Winkler, 1974 | LLK |
C7H7+ | 11.3 ± 0.1 | ? | EI | Tajima and Tsuchiya, 1972 | LLK |
C7H7+ | 11.3 | I | EI | Yeo and Williams, 1970 | RDSH |
De-protonation reactions
C7H6I- + =
By formula: C7H6I- + H+ = C7H7I
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 372.1 ± 3.1 | kcal/mol | G+TS | Wenthold, Wierschke, et al., 1994 | gas phase; Between MeCN and FCH2CH2OH; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 365.0 ± 3.0 | kcal/mol | IMRB | Wenthold, Wierschke, et al., 1994 | gas 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
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy Tboil Boiling point ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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