Benzene, 1-iodo-3-methyl-

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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

Mass spectrum (electron ionization)

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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: 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

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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

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Column type Active phase I Reference Comment
CapillaryOV-11121.8Gautzsch and Zinn, 19968. K/min; Tstart: 35. C; Tend: 300. C
PackedSE-301148.Buchman, Cao, et al., 1984He, 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

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Column type Active phase I Reference Comment
PackedCarbowax 20M1674.Buchman, Cao, et al., 1984He, 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

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Column type Active phase I Reference Comment
PackedSE-301143.Peng, Ding, et al., 1988Helium, Supelcoport, 40. C @ 4. min, 10. K/min, 200. C @ 60. min; Column length: 3.05 m
PackedSE-301148.Peng, Ding, et al., 1988Helium, 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

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Column type Active phase I Reference Comment
CapillaryOV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc.1148.Waggott and Davies, 1984Hydrogen; 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

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