Benzoic acid, 2-methoxy-

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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
Δfgas-103.7 ± 0.29kcal/molCcbColomina, Jimenez, et al., 1978 

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
Δfsolid-128.7 ± 0.29kcal/molCcbColomina, Jimenez, et al., 1978 
Quantity Value Units Method Reference Comment
Δcsolid-896.96 ± 0.15kcal/molCcbColomina, Jimenez, et al., 1978Corresponding Δfsolid = -128.71 kcal/mol (simple calculation by NIST; no Washburn corrections)

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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Tfus374.05KN/ADavies and Jones, 1954Uncertainty assigned by TRC = 0.5 K; TRC
Tfus370.KN/ABarnes and McElvain, 1937Uncertainty assigned by TRC = 6. K; TRC
Tfus374.KN/ABarnes and McElvain, 1937Uncertainty assigned by TRC = 3. K; TRC
Quantity Value Units Method Reference Comment
Δvap21.9kcal/molSub-FusPerlovich, Volkova, et al., 2008AC
Quantity Value Units Method Reference Comment
Δsub26.5 ± 0.2kcal/molGSPerlovich, Volkova, et al., 2008Based on data from 309. to 363. K.; AC
Δsub25.02kcal/molN/AColomina, Jimenez, et al., 1978DRB
Δsub25.02 ± 0.07kcal/molMEColomina, Jimenez, et al., 1978AC
Δsub21.7 ± 0.1kcal/molVDavies and Jones, 1954ALS

Enthalpy of sublimation

ΔsubH (kcal/mol) Temperature (K) Method Reference Comment
24.19333.AStephenson and Malanowski, 1987Based on data from 318. to 353. K.; AC
25.02 ± 0.07319.34VColomina, Jimenez, et al., 1978ALS
21.7 ± 0.1360.GSMalaspina, 1973Based on data from 353. to 368. K. See also Stephenson and Malanowski, 1987.; AC
21.7360.GSDavies and Jones, 1954Based on data from 353. to 368. K. See also Jones, 1960.; AC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Method Reference Comment
5.74374.6DSCPerlovich, Volkova, et al., 2008AC

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:


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

C8H7O3- + Hydrogen cation = Benzoic acid, 2-methoxy-

By formula: C8H7O3- + H+ = C8H8O3

Quantity Value Units Method Reference Comment
Δr339.3 ± 2.1kcal/molG+TSKebarle and McMahon, 1977gas phase
Quantity Value Units Method Reference Comment
Δr332.4 ± 2.0kcal/molIMREKebarle and McMahon, 1977gas phase

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 by: John E. Bartmess

De-protonation reactions

C8H7O3- + Hydrogen cation = Benzoic acid, 2-methoxy-

By formula: C8H7O3- + H+ = C8H8O3

Quantity Value Units Method Reference Comment
Δr339.3 ± 2.1kcal/molG+TSKebarle and McMahon, 1977gas phase
Quantity Value Units Method Reference Comment
Δr332.4 ± 2.0kcal/molIMREKebarle and McMahon, 1977gas phase

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: Coblentz Society, Inc.

Condensed Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

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

Additional Data

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Owner COBLENTZ SOCIETY
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin WYANDOTTE CHEMICALS CORP., WYANDOTTE, MICHIGAN, USA
Source reference COBLENTZ NO. 321
Date Not specified, most likely prior to 1970
Name(s) 2-methoxybenzoic acid
State SOLID (MULL)
Instrument Not specified, most likely a prism, grating, or hybrid spectrometer.
Resolution 4
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY NIST FROM HARD COPY
Melting point 101-103 C

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


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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Mass spectrum
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Additional Data

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Due to licensing restrictions, this spectrum cannot be downloaded.

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, 2010
NIST MS number 375012

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, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry 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.

Colomina, Jimenez, et al., 1978
Colomina, M.; Jimenez, P.; Roux, M.V.; Turrion, C., Thermochemical properties of benzoic acid derivatives VII. Enthalpies of combustion and formation of the o-, m-, and p-methoxy-benzoic acids, J. Chem. Thermodyn., 1978, 10, 661-665. [all data]

Davies and Jones, 1954
Davies, M.; Jones, J.I., The sublimation pressures and heats of sublimation of some carboxylic acids, Trans. Faraday Soc., 1954, 50, 1042. [all data]

Barnes and McElvain, 1937
Barnes, H.M.; McElvain, S.M., Further Observations on the Condensation of Benzene with Alloxan, J. Am. Chem. Soc., 1937, 59, 2348-51. [all data]

Perlovich, Volkova, et al., 2008
Perlovich, German L.; Volkova, Tatyana V.; Manin, Alex N.; Bauer-Brandl, Annette, Extent and mechanism of solvation and partitioning of isomers of substituted benzoic acids: A thermodynamic study in the solid state and in solution, J. Pharm. Sci., 2008, 97, 9, 3883-3896, https://doi.org/10.1002/jps.21260 . [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]

Malaspina, 1973
Malaspina, L., Microcalorimetric determination of the enthalpy of sublimation of benzoic acid and anthracene, J. Chem. Phys., 1973, 59, 1, 387, https://doi.org/10.1063/1.1679817 . [all data]

Jones, 1960
Jones, A.H., Sublimation Pressure Data for Organic Compounds., J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019 . [all data]

Kebarle and McMahon, 1977
Kebarle, P.; McMahon, T.B., Intrinsic Acidities of Substituted Phenols and Benzoic Acids Determined by Gas Phase Proton Transfer Equilibria, J. Am. Chem. Soc., 1977, 99, 7, 2222, https://doi.org/10.1021/ja00449a032 . [all data]


Notes

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