Benzenethiol
- Formula: C6H6S
- Molecular weight: 110.177
- IUPAC Standard InChI: InChI=1S/C6H6S/c7-6-4-2-1-3-5-6/h1-5,7H
- IUPAC Standard InChIKey: RMVRSNDYEFQCLF-UHFFFAOYSA-N
- CAS Registry Number: 108-98-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Isotopologues:
- Other names: Mercaptobenzene; Phenol, thio-; Phenyl mercaptan; Phenylthiol; Thiophenol; Rcra waste number P014; Thiofenol; UN 2337; USAF XR-19; NSC 6953; 930-69-8
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 26.86 ± 0.21 | kcal/mol | Ccr | Scott, McCullough, et al., 1956 | Reanalyzed by Cox and Pilcher, 1970, Original value = 26.66 ± 0.28 kcal/mol |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | 15.22 ± 0.20 | kcal/mol | Ccr | Scott, McCullough, et al., 1956 | Reanalyzed by Cox and Pilcher, 1970, Original value = 15.02 ± 0.27 kcal/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -928.43 ± 0.15 | kcal/mol | Ccr | Scott, McCullough, et al., 1956 | Reanalyzed by Cox and Pilcher, 1970, Original value = -928.27 ± 0.15 kcal/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid | 53.250 | cal/mol*K | N/A | Scott, McCullough, et al., 1956 | DH |
| S°liquid | 52.61 | cal/mol*K | N/A | Parks, Todd, et al., 1936 | Extrapolation below 90 K, 54.68 J/mol*K.; DH |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 41.401 | 298.15 | Scott, McCullough, et al., 1956 | T = 10 to 380 K.; DH |
| 42.199 | 298.1 | Parks, Todd, et al., 1936 | T = 90 to 300 K.; DH |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed phase 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 as indicated in comments:
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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
+
=
By formula: C6H5S- + H+ = C6H6S
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 340.4 ± 2.1 | kcal/mol | G+TS | Taft and Bordwell, 1988 | gas phase; B |
| ΔrH° | >340.1 ± 1.8 | kcal/mol | D-EA | Richardson, Stephenson, et al., 1975 | gas phase; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 333.4 ± 2.1 | kcal/mol | IMRE | Guillemin, Riague, et al., 2005 | gas phase; B |
| ΔrG° | 333.8 ± 2.0 | kcal/mol | IMRE | Taft and Bordwell, 1988 | gas phase; B |
| ΔrG° | >333.5 ± 1.9 | kcal/mol | H-TS | Richardson, Stephenson, et al., 1975 | gas phase; B |
+
=
+
By formula: H2O + C8H8OS = C6H6S + C2H4O2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -2.97 ± 0.08 | kcal/mol | Cm | Wadso, 1960 | liquid phase; Heat of hydrolysis; ALS |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Scott, McCullough, et al., 1956
Scott, D.W.; McCullough, J.P.; Hubbard, W.N.; Messerly, J.F.; Hossenlopp, I.A.; Frow, F.R.; Waddington, G.,
Benzenethiol: Thermodynamic properties in the solid, liquid and vapor states; internal rotation of the thiol group,
J. Am. Chem. Soc., 1956, 78, 5463-5468. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Parks, Todd, et al., 1936
Parks, G.S.; Todd, S.S.; Moore, W.A.,
Thermal data on organic compounds. XVI. Some heat capacity, entropy and free energy data for typical benzene derivatives and heterocyclic compounds,
J. Am. Chem. Soc., 1936, 58, 398-401. [all data]
Taft and Bordwell, 1988
Taft, R.W.; Bordwell, F.G.,
Structural and Solvent Effects Evaluated from Acidities Measured in Dimethyl Sulfoxide and in the Gas Phase,
Acc. Chem. Res., 1988, 21, 12, 463, https://doi.org/10.1021/ar00156a005
. [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]
Guillemin, Riague, et al., 2005
Guillemin, J.C.; Riague, E.H.; Gal, J.F.; Maria, P.C.; Mo, O.; Yanez, M.,
Acidity trends in alpha,beta-unsaturated sulfur, selenium, and tellurium derivatives: Comparison with C-, Si-, Ge-, Sn-, N-, P-, As-, and Sb-containing analogues,
Chem. Eur. J., 2005, 11, 7, 2145-2153, https://doi.org/10.1002/chem.200400989
. [all data]
Wadso, 1960
Wadso, I.,
Heats of hydrolysis of phenyl acetate and phenyl thiolacetate,
Acta Chem. Scand., 1960, 14, 561-565. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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