phenoxide anion
- Formula: C6H5O-
- Molecular weight: 93.1038
- IUPAC Standard InChIKey: ISWSIDIOOBJBQZ-UHFFFAOYSA-M
- CAS Registry Number: 3229-70-7
- Chemical structure:
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Reaction thermochemistry 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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Individual Reactions
By formula: C6H5O- + H+ = C6H6O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1462. ± 10. | kJ/mol | AVG | N/A | Average of 6 out of 7 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1432. ± 8.4 | kJ/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; Shiner, Vorner, et al., 1986: tautomer acidities ΔHacid(ortho) = 343.9±3.1 kcal, para = 340.1±2 kcal. However, Capponi, Gut, et al., 1999 based on aq. soln. results, imply 18 and 14 kcal/mol difference.; value altered from reference due to change in acidity scale; B |
ΔrG° | 1426. ± 7.9 | kJ/mol | CIDC | Angel and Ervin, 2004 | gas phase; B |
ΔrG° | 1437. ± 8.4 | kJ/mol | IMRE | Cumming and Kebarle, 1978 | gas phase; B |
ΔrG° | >1429. ± 7.5 | kJ/mol | H-TS | Richardson, Stephenson, et al., 1975 | gas phase; B |
By formula: C6H5O- + C2H4O2 = (C6H5O- • C2H4O2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 115. | kJ/mol | PHPMS | Meot-Ner and Sieck, 1986 | gas phase; calculated from CH3COO-.C6H5OH; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Meot-Ner and Sieck, 1986 | gas phase; calculated from CH3COO-.C6H5OH; M |
By formula: C6H5O- + H2O = (C6H5O- • H2O)
Bond type: Hydrogen bond (negative ion to hydride)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 64.4 | kJ/mol | PHPMS | Meot-Ner and Sieck, 1986 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 100. | J/mol*K | PHPMS | Meot-Ner and Sieck, 1986 | gas phase; M |
+
= C6H7O2-
By formula: C6H5O- + H2O = C6H7O2-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 64.4 ± 4.2 | kJ/mol | N/A | Meot-Ner and Sieck, 1986 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 34. ± 6.7 | kJ/mol | TDAs | Meot-Ner and Sieck, 1986 | gas phase; B |
+
= C8H11O2-
By formula: C6H5O- + C2H6O = C8H11O2-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 80.8 ± 4.2 | kJ/mol | N/A | Meot-Ner and Sieck, 1986 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 46.9 ± 6.7 | kJ/mol | TDAs | Meot-Ner and Sieck, 1986 | gas phase; B |
By formula: C6H5O- + C2H6O = (C6H5O- • C2H6O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 80.8 | kJ/mol | PHPMS | Meot-Ner and Sieck, 1986 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 113. | J/mol*K | PHPMS | Meot-Ner and Sieck, 1986 | gas phase; M |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry 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 by: John E. Bartmess
Protonation reactions
By formula: C6H5O- + H+ = C6H6O
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1462. ± 10. | kJ/mol | AVG | N/A | Average of 6 out of 7 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1432. ± 8.4 | kJ/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; Shiner, Vorner, et al., 1986: tautomer acidities ΔHacid(ortho) = 343.9±3.1 kcal, para = 340.1±2 kcal. However, Capponi, Gut, et al., 1999 based on aq. soln. results, imply 18 and 14 kcal/mol difference.; value altered from reference due to change in acidity scale |
ΔrG° | 1426. ± 7.9 | kJ/mol | CIDC | Angel and Ervin, 2004 | gas phase |
ΔrG° | 1437. ± 8.4 | kJ/mol | IMRE | Cumming and Kebarle, 1978 | gas phase |
ΔrG° | >1429. ± 7.5 | kJ/mol | H-TS | Richardson, Stephenson, et al., 1975 | gas phase |
References
Go To: Top, Reaction thermochemistry 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.
Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr.,
The gas phase acidity scale from methanol to phenol,
J. Am. Chem. Soc., 1979, 101, 6047. [all data]
Shiner, Vorner, et al., 1986
Shiner, C.S.; Vorner, P.E.; Kass, S.R.,
Gas phase acidities and heats of formation of 2,4- and 2,5- cyclohexadien-1-one, the keto tautomers of phenol,
J. Am. Chem. Soc., 1986, 108, 5699. [all data]
Capponi, Gut, et al., 1999
Capponi, M.; Gut, I.G.; Hellrung, B.; Persy, G.; Wirz, J.,
Ketonization equilibria of phenol in aqueous solution,
Can. J. Chem., 1999, 77, 5-6, 605-613, https://doi.org/10.1139/v99-048
. [all data]
Angel and Ervin, 2004
Angel, L.A.; Ervin, K.M.,
Competitive threshold collision-induced dissociation: Gas-phase acidity and O-H bond dissociation enthalpy of phenol,
J. Phys. Chem. A, 2004, 108, 40, 8346-8352, https://doi.org/10.1021/jp0474529
. [all data]
Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P.,
Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A),
Can. J. Chem., 1978, 56, 1. [all data]
Richardson, Stephenson, et al., 1975
Richardson, J.H.; Stephenson, L.M.; Brauman, J.I.,
Photodetachment of electrons from phenoxides and thiophenoxide,
J. Am. Chem. Soc., 1975, 97, 2967. [all data]
Meot-Ner and Sieck, 1986
Meot-Ner, M.; Sieck, L.W.,
The ionic hydrogen bond and ion solvation. 5. OH...O- bonds. Gas phase solvation and clustering of alkoxide and carboxylate anions,
J. Am. Chem. Soc., 1986, 108, 7525. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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