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 ion energetics data
Go To: Top, Mass spectrum (electron ionization), Gas Chromatography, 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:
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 |
Mass spectrum (electron ionization)
Go To: Top, Gas phase ion energetics data, Gas Chromatography, References, Notes
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
Spectrum
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Additional Data
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Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | Chuck Anderson, Aldrich Chemical Co. |
NIST MS number | 107309 |
Gas Chromatography
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), References, Notes
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
Van Den Dool and Kratz RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | OV-1 | 1121.8 | Gautzsch and Zinn, 1996 | 8. K/min; Tstart: 35. C; Tend: 300. C |
Packed | SE-30 | 1148. | Buchman, Cao, et al., 1984 | He, Chromosorb AW, 40. C @ 10. min, 10. K/min, 210. C @ 30. min; Column length: 3.05 m |
Van Den Dool and Kratz RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Packed | Carbowax 20M | 1674. | Buchman, Cao, et al., 1984 | He, Supelcoport, 40. C @ 10. min, 10. K/min, 210. C @ 30. min; Column length: 3.05 m |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Packed | SE-30 | 1143. | Peng, Ding, et al., 1988 | Helium, Supelcoport, 40. C @ 4. min, 10. K/min, 200. C @ 60. min; Column length: 3.05 m |
Packed | SE-30 | 1148. | Peng, Ding, et al., 1988 | Helium, Supelcoport, 40. C @ 4. min, 10. K/min, 200. C @ 60. min; Column length: 3.05 m |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | OV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc. | 1148. | Waggott and Davies, 1984 | Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified |
References
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
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]
Gautzsch and Zinn, 1996
Gautzsch, R.; Zinn, P.,
Use of incremental models to estimate the retention indexes of aromatic compounds,
Chromatographia, 1996, 43, 3/4, 163-176, https://doi.org/10.1007/BF02292946
. [all data]
Buchman, Cao, et al., 1984
Buchman, O.; Cao, G.-Y.; Peng, C.T.,
Structure assignment by retention index in gas-liquid radiochromatography of substituted cyclohexenes,
J. Chromatogr., 1984, 312, 75-90, https://doi.org/10.1016/S0021-9673(01)92765-7
. [all data]
Peng, Ding, et al., 1988
Peng, C.T.; Ding, S.F.; Hua, R.L.,
Radioimpurity identification by retention index in tritium labeling,
J. Radioanal. Nucl. Chem., 1988, 123, 2, 411-420, https://doi.org/10.1007/BF02034907
. [all data]
Waggott and Davies, 1984
Waggott, A.; Davies, I.W.,
Identification of organic pollutants using linear temperature programmed retention indices (LTPRIs) - Part II, 1984, retrieved from http://dwi.defra.gov.uk/research/completed-research/reports/dwi0383.pdf. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, References
- Symbols used in this document:
AE Appearance energy ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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