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Benzene, 1,4-dimethoxy-

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Phase change data

Go To: Top, Gas phase ion energetics data, IR Spectrum, 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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil485.8KN/AWeast and Grasselli, 1989BS
Tboil485.8KN/APerkin, 1896Uncertainty assigned by TRC = 1.5 K; TRC
Quantity Value Units Method Reference Comment
Tfus329.KN/AVowinkel, 1966Uncertainty assigned by TRC = 3. K; TRC
Tfus329.45KN/ANagakura and Baba, 1952Uncertainty assigned by TRC = 0.6 K; TRC
Quantity Value Units Method Reference Comment
Deltasub20.1 ± 0.55kcal/molCMatos, Miranda, et al., 2000AC

Reduced pressure boiling point

Tboil (K) Pressure (atm) Reference Comment
382.20.026Weast and Grasselli, 1989BS

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
14.8313.AStephenson and Malanowski, 1987Based on data from 298. - 357. K.; AC

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

Go To: Top, Phase change data, IR Spectrum, 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 evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
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)7.56 ± 0.11eVN/AN/AL

Ionization energy determinations

IE (eV) Method Reference Comment
7.78 ± 0.03PIPonomarev, Arapov, et al., 1986LBLHLM
7.53 ± 0.03SOikawa, Abe, et al., 1985LBLHLM
7.54PEBehan, Johnstone, et al., 1976LLK
7.45EICooks, Bertrand, et al., 1973LLK
7.9 ± 0.1EIBrown, 1970RDSH
7.7 ± 0.15CTSVoigt and Reid, 1964RDSH
7.90PEChmutova, Vtyurina, et al., 1979Vertical value; LLK
7.96PEAnderson, Kollman, et al., 1979Vertical value; LLK
7.90PEDomelsmith and Houk, 1978Vertical value; LLK
7.83 ± 0.015PEKlessinger, Asmus, et al., 1975Vertical value; LLK
7.90PEBock and Wagner, 1972Vertical value; LLK
7.90PEBaker, May, et al., 1968Vertical value; RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C6H5+15.8CH3+CO+H2OEIMori, Ogawa, et al., 1992LL
C6H7O+12.9CH3+COEIMori, Ogawa, et al., 1992LL
C7H7O2+11.27 ± 0.05CH3PIPonomarev, Arapov, et al., 1986LBLHLM
C7H7O2+11.0 ± 0.1CH3EIBrown, 1970RDSH
C7H7O2+10.4 ± 0.1CH3EITait, Shannon, et al., 1962RDSH
C7H8O+11.00HCHOEICooks, Bertrand, et al., 1973LLK

IR Spectrum

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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

Gas Phase Spectrum

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IR spectrum
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Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner NIST Standard Reference Data Program
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Sadtler Research Labs Under US-EPA Contract
State gas

This IR spectrum is from the NIST/EPA Gas-Phase Infrared Database .


Mass spectrum (electron ionization)

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, 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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Mass spectrum
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Additional Data

View image of digitized spectrum (can be printed in landscape orientation).

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Download spectrum in JCAMP-DX format.

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 NIST Mass Spectrometry Data Center, 1990.
NIST MS number 113405

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


References

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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]

Perkin, 1896
Perkin, W.H., LXIX. On Magnetic Rotatory Power, especially of Aromatic Compounds, J. Chem. Soc., 1896, 69, 1025-1257. [all data]

Vowinkel, 1966
Vowinkel, E., Preparation of Aryl Alky8 Ethers by Means of O-Alkyl-N,N'-dicyclohexyl- isoureas, Chem. Ber., 1966, 99, 1479-84. [all data]

Nagakura and Baba, 1952
Nagakura, S.; Baba, H., Dipole moments and near-ultraviolet absorption of some monosubsti- tuted benzenes--the effect of solvents and hydrogen bonding., J. Am. Chem. Soc., 1952, 74, 5693. [all data]

Matos, Miranda, et al., 2000
Matos, M.A.R.; Miranda, M.S.; Morais, V.M.F., Calorimetric and Theoretical Determination of Standard Enthalpies of Formation of Dimethoxy- and Trimethoxybenzene Isomers, J. Phys. Chem. A, 2000, 104, 40, 9260-9265, https://doi.org/10.1021/jp001928g . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Ponomarev, Arapov, et al., 1986
Ponomarev, D.A.; Arapov, O.V.; Sergeev, Y.L.; Chistyakov, A.B., [Title unavailable], Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 1986, 29, 107. [all data]

Oikawa, Abe, et al., 1985
Oikawa, A.; Abe, H.; Mikami, N.; Ito, M., Electronic spectra and ionization potentials of rotational isomers of severaldDisubstituted benzenes, Chem. Phys. Lett., 1985, 116, 50. [all data]

Behan, Johnstone, et al., 1976
Behan, J.M.; Johnstone, R.A.W.; Bentley, T.W., An evaluation of empirical methods for calculating the ionization potentials of substituted benzenes, Org. Mass Spectrom., 1976, 11, 207. [all data]

Cooks, Bertrand, et al., 1973
Cooks, R.G.; Bertrand, M.; Beynon, J.H.; Rennekamp, M.E.; Setser, D.W., Energy partitioning data as an ion structure probe. Substituted anisoles, J. Am. Chem. Soc., 1973, 95, 1732. [all data]

Brown, 1970
Brown, P., Kinetic studies in mass spectrometry. VIII. Competing [M-CH3] and [M-CH2O] reactions in substituted anisoles. Approximate activation energies from ionization appearance potentials, Org. Mass Spectrom., 1970, 4, 519. [all data]

Voigt and Reid, 1964
Voigt, E.M.; Reid, C., Ionization potentials of substituted benzenes and their charge-transfer spectra with tetracyanoethylene, J. Am. Chem. Soc., 1964, 86, 3930. [all data]

Chmutova, Vtyurina, et al., 1979
Chmutova, G.A.; Vtyurina, N.N.; Komina, T.V.; Gazizov, I.G.; Bock, H., Molecular-orbital characteristics of anisole isologs X-C6H4-ECH3 (E = O, S, Se) containing donor substituents X, Zh. Obshch. Khim., 1979, 49, 192. [all data]

Anderson, Kollman, et al., 1979
Anderson, G.M., III; Kollman, P.A.; Domelsmith, L.N.; Houk, K.N., Methoxy group nonplanarity in o-dimethoxybenzenes. Simple predictive models for conformations and rotational barriers in alkoxyaromatics, J. Am. Chem. Soc., 1979, 101, 2344. [all data]

Domelsmith and Houk, 1978
Domelsmith, L.N.; Houk, K.N., Photoelectron spectroscopic studies of hallucinogens: The use of ionization potentials in QSAR, NIDA Res. Monogr., 1978, 22, 423. [all data]

Klessinger, Asmus, et al., 1975
Klessinger, M.; Asmus, P.; Kraatz, U., Photoelektronenspektren organischer verbindungen-VII, Tetrahedron, 1975, 31, 517. [all data]

Bock and Wagner, 1972
Bock, H.; Wagner, G., Electron lone pairs in organic sulfides and disulfides, Angew. Chem. Int. Ed. Engl., 1972, 11, 119. [all data]

Baker, May, et al., 1968
Baker, A.D.; May, D.P.; Turner, D.W., Molecular photoelectron spectroscopy. Part VII. The vertical ionisation potentials of benzene and some of its monosubstituted and 1,4-disubstituted derivatives, J. Chem. Soc. B, 1968, 22. [all data]

Mori, Ogawa, et al., 1992
Mori, Y.; Ogawa, Y.; Shinoda, H.; Kitagawa, T., Two competing fragmentation processes in dimethoxybenzenes depending on their positional isomers: Elimination of CH3 and CHnO (n = 1-3) and formation of methoxycyclopentadienyl and protonated phenol ions, Org. Mass Spectrom., 1992, 27, 578. [all data]

Tait, Shannon, et al., 1962
Tait, J.M.S.; Shannon, T.W.; Harrison, A.G., The structure of substituted C7 ions from benzyl derivatives at the appearance potential threshold, J. Am. Chem. Soc., 1962, 84, 4. [all data]


Notes

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References