Mequinol

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Phase change data

Go To: Top, Gas phase ion energetics data, 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
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil516.2KN/AWeast and Grasselli, 1989BS
Tboil516.KN/ABuckingham and Donaghy, 1982BS
Quantity Value Units Method Reference Comment
Tfus326.KN/ABuckingham and Donaghy, 1982BS
Quantity Value Units Method Reference Comment
Δsub94.4 ± 1.2kJ/molCMatos, Miranda, et al., 2003AC

Enthalpy of vaporization

ΔvapH (kJ/mol) Temperature (K) Method Reference Comment
61.4433.AStephenson and Malanowski, 1987Based on data from 418. to 518. K. See also Kkykj and Repas, 1973.; AC

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Reference Comment
88.7289.Stephenson and Malanowski, 1987Based on data from 278. to 300. K. See also Aihara, 1960.; AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
18.3328.4Lee, Chang, et al., 1997AC

Gas phase ion energetics data

Go To: Top, Phase change data, 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

View reactions leading to C7H8O2+ (ion structure unspecified)

Ionization energy determinations

IE (eV) Method Reference Comment
7.50EICooks, Bertrand, et al., 1973LLK
8.0 ± 0.1EIBrown, 1970RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C6H5O2+11.1 ± 0.1CH3EIBrown, 1970RDSH
C6H5O2+11.0 ± 0.1CH3EITait, Shannon, et al., 1962RDSH
C6H6O+10.30HCHOEICooks, Bertrand, et al., 1973LLK

De-protonation reactions

C7H7O2- + Hydrogen cation = Mequinol

By formula: C7H7O2- + H+ = C7H8O2

Quantity Value Units Method Reference Comment
Δr1466. ± 8.8kJ/molG+TSFujio, McIver, et al., 1981gas phase; value altered from reference due to change in acidity scale; B
Δr1469. ± 9.6kJ/molG+TSKebarle and McMahon, 1977gas phase; B
Quantity Value Units Method Reference Comment
Δr1437. ± 8.4kJ/molIMREFujio, McIver, et al., 1981gas phase; value altered from reference due to change in acidity scale; B
Δr1440. ± 8.4kJ/molIMREKebarle and McMahon, 1977gas phase; B

References

Go To: Top, Phase change 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.

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]

Buckingham and Donaghy, 1982
Buckingham, J.; Donaghy, S.M., Dictionary of Organic Compounds: Fifth Edition, Chapman and Hall, New York, 1982, 1. [all data]

Matos, Miranda, et al., 2003
Matos, M. Agostinha R.; Miranda, Margarida S.; Morais, Victor M.F., Thermochemical Study of the Methoxy- and Dimethoxyphenol Isomers, J. Chem. Eng. Data, 2003, 48, 3, 669-679, https://doi.org/10.1021/je025641j . [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]

Kkykj and Repas, 1973
Kkykj, J.; Repas, M., Petrochemia, 1973, 13, 179. [all data]

Aihara, 1960
Aihara, Ariyuki, Estimation of the Energy of Hydrogen Bonds Formed in Crystals. II. Phenols, Bull. Chem. Soc. Jpn., 1960, 33, 2, 194-200, https://doi.org/10.1246/bcsj.33.194 . [all data]

Lee, Chang, et al., 1997
Lee, Ming-Jer; Chang, Yao-Kun; Lin, Ho-mu; Chen, Chang-Hsin, Solid-Liquid Equilibria for 4-Methoxyphenol with Catechol, Ethylenediamine, or Piperazine, J. Chem. Eng. Data, 1997, 42, 2, 349-352, https://doi.org/10.1021/je960201b . [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]

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]

Fujio, McIver, et al., 1981
Fujio, M.; McIver, R.T., Jr.; Taft, R.W., Effects on the acidities of phenols from specific substituent-solvent interactions. Inherent substituent parameters from gas phase acidities, J. Am. Chem. Soc., 1981, 103, 4017. [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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