2-Propanethiol, 2-methyl-
- Formula: C4H10S
- Molecular weight: 90.187
- IUPAC Standard InChIKey: WMXCDAVJEZZYLT-UHFFFAOYSA-N
- CAS Registry Number: 75-66-1
- 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. - Other names: tert-Butanethiol; tert-Butylmercaptan; tert-Butylthiol; 1,1-Dimethylethanethiol; 2-Isobutanethiol; 2-Methyl-2-propanethiol; tert-C4H9SH; t-Butyl mercaptan; tert-Butyl hydrosulfide; 2-Methyl-2-propylthiol; tertiary-Butyl mercaptan; 2-methylpropane-2-thiol
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Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, Gas Chromatography, 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 | -108.7 ± 0.88 | kJ/mol | Ccr | Hubbard, Good, et al., 1958 | see Hubbard, Katz, et al., 1954 and McCullough, Scott, et al., 1953 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Gas Chromatography, 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:
HL - Edward P. Hunter and Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 816.4 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 785.1 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.03 | PE | Ogata, Onizuka, et al., 1973 | LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C3H7S+ | 11.4 ± 0.15 | CH3 | EI | Broer and Weringa, 1980 | LLK |
De-protonation reactions
C4H9S- + =
By formula: C4H9S- + H+ = C4H10S
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1475. ± 9.2 | kJ/mol | G+TS | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1449. ± 8.4 | kJ/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
Gas Chromatography
Go To: Top, Gas phase thermochemistry data, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Kovats' RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | DB-5 | 100. | 605.5 | Miller and Bruno, 2003 | 30. m/0.25 mm/0.1 μm |
Capillary | DB-5 | 120. | 617.0 | Miller and Bruno, 2003 | 30. m/0.25 mm/0.1 μm |
Capillary | DB-5 | 60. | 599.2 | Miller and Bruno, 2003 | 30. m/0.25 mm/0.1 μm |
Capillary | DB-5 | 80. | 602.5 | Miller and Bruno, 2003 | 30. m/0.25 mm/0.1 μm |
Packed | Apiezon M | 130. | 602. | Garbuzov, Misharina, et al., 1985 | He or N2, Chromosorb W, AW-DMCS; Column length: 2.1 m |
Packed | Apiezon M | 60. | 586. | Mikhailova, Gren, et al., 1985 | Chromosorb WAW; Column length: 2.1 m |
Packed | Squalane | 60. | 574. | Zygmunt and Staszewski, 1981 | Chromosorb W DMCS; Column length: 2. m |
Packed | Squalane | 80. | 577. | Zygmunt and Staszewski, 1981 | Chromosorb W DMCS; Column length: 2. m |
Packed | Apiezon M | 130. | 603. | Golovnya and Garbuzov, 1974 | N2, Chromosorb W; Column length: 2.1 m |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Apiezon M | 602. | Zhu, Wang, et al., 2007 | Program: not specified |
Kovats' RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | PEG-20M | 779. | Zhu, Wang, et al., 2007 | Program: not specified |
Normal alkane RI, non-polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Capillary | Polydimethyl siloxane with 5 % Ph groups | 100. | 606. | Safa and Hadjmohannadi, 2005 | 30. m/0.25 mm/0.10 μm, Nitrogen |
Capillary | Polydimethyl siloxane with 5 % Ph groups | 60. | 599. | Safa and Hadjmohannadi, 2005 | 30. m/0.25 mm/0.10 μm, Nitrogen |
Capillary | Polydimethyl siloxane with 5 % Ph groups | 80. | 602. | Safa and Hadjmohannadi, 2005 | 30. m/0.25 mm/0.10 μm, Nitrogen |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | PONA | 584. | Yang, Wang, et al., 2004 | 50. m/0.20 mm/0.50 μm, N2, 2. K/min; Tstart: 35. C; Tend: 170. C |
Capillary | PONA | 594. | Yang, Wang, et al., 2003 | 50. m/0.20 mm/0.50 μm, 2. K/min; Tstart: 30. C; Tend: 150. C |
Packed | Porapack Q | 600. | Guevas A.P. and Tellez, 1977 | Helium, Porapak Q, 8. K/min; Column length: 3.5 m; Tstart: 220. C |
Normal alkane RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | PONA | 595. | Yang, Wang, et al., 2003 | 50. m/0.20 mm/0.50 μm; Program: not specified |
Capillary | Polydimethyl siloxanes | 587. | Zenkevich, 1998 | Program: not specified |
Capillary | Methyl Silicone | 589. | Zenkevich and Kuznetsova, 1990 | Program: not specified |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hubbard, Good, et al., 1958
Hubbard, W.N.; Good, W.D.; Waddington, G.,
The heats of combustion, formation and isomerization of the seven isomeric C4H10S alkane thiols and sulfides,
J. Phys. Chem., 1958, 62, 614-617. [all data]
Hubbard, Katz, et al., 1954
Hubbard, W.N.; Katz, C.; Waddington, G.,
A rotating combustion bomb for precision calorimetry. Heats of combustion of some sulfur-containing compounds,
J. Phys. Chem., 1954, 58, 142. [all data]
McCullough, Scott, et al., 1953
McCullough, J.P.; Scott, D.W.; Finke, H.L.; Hubbard, W.N.; Gross, M.E.; Katz, C.; Pennington, R.E.; Messerly, J.F.; Waddington, G.,
The thermodynamic properties of 2-methyl-2-propanethiol from 0 to 1000°K,
J. Am. Chem. Soc., 1953, 75, 1818-18. [all data]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Ogata, Onizuka, et al., 1973
Ogata, H.; Onizuka, H.; Nihei, Y.; Kamada, H.,
The photoelectron spectra of alcohols, mercaptans and amines,
Bull. Chem. Soc. Jpn., 1973, 46, 3036. [all data]
Broer and Weringa, 1980
Broer, W.J.; Weringa, W.D.,
Potential energy profiles for the unimolecular reactions of [C3H7S]+ ions,
Org. Mass Spectrom., 1980, 15, 229. [all data]
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]
Miller and Bruno, 2003
Miller, K.E.; Bruno, T.J.,
Isothermal Kováts retention indices of sulfur compounds on a poly(5% diphenyl-95% dimethylsiloxane) stationary phase,
J. Chromatogr. A, 2003, 1007, 1-2, 117-125, https://doi.org/10.1016/S0021-9673(03)00958-0
. [all data]
Garbuzov, Misharina, et al., 1985
Garbuzov, V.G.; Misharina, T.A.; Aerov, A.F.; Golovnya, R.V.,
Gas chromatographic retention indices for sulphur(II)-containing organic substances,
J. Anal. Chem. USSR (Engl. Transl.), 1985, 40, 4, 576-586. [all data]
Mikhailova, Gren, et al., 1985
Mikhailova, T.V.; Gren, A.I.; Vysotskaja, L.E.; Misharina, T.A.; Vitt, S.V.; Golovnya, R.V.,
Identification of sulphur-organic compounds obtained by thermal treatment of the meat broths in the presence of alkyl-mercaptopropanol,
Nahrung, 1985, 29, 7, 671-680, https://doi.org/10.1002/food.19850290705
. [all data]
Zygmunt and Staszewski, 1981
Zygmunt, B.; Staszewski, R.,
Retention index and gas chromatographic-mass spectrometric identification of thiols in liquified gas,
Chem. Anal. (Warsaw), 1981, 26, 109-113. [all data]
Golovnya and Garbuzov, 1974
Golovnya, R.V.; Garbuzov, V.G.,
Effect of heteroatom in aliphatic sulfur- and oxygen-containing compounds on the values of the retention indices in gas chromatography,
Izv. Akad. Nauk SSSR Ser. Khim., 1974, 7, 1519-1521. [all data]
Zhu, Wang, et al., 2007
Zhu, X.H.; Wang, W.; Schramm, K.-W.; Niu, W.,
Prediction of the Kova´ ts Retention Indices of Thiols by Use of Quantum Chemical and Physicochemical Descriptors,
Chromatographia, 2007, 65, 11-12, 719-724, https://doi.org/10.1365/s10337-007-0237-3
. [all data]
Safa and Hadjmohannadi, 2005
Safa, F.; Hadjmohannadi, M.R.,
Use of topological indices of organic sulfur compounds in quantitative structure-retention relationship study,
QSAR Comb. Sci., 2005, 24, 9, 1026-1032, https://doi.org/10.1002/qsar.200530008
. [all data]
Yang, Wang, et al., 2004
Yang, Y.; Wang, Z.; Zong, B.; Yang, H.,
Determination of sulfur compounds in fluid catalytic cracking gasoline by gas chromatography with a sulfur chemiluminiscence detector,
Chin. J. Chromatogr., 2004, 22, 3, 216-219. [all data]
Yang, Wang, et al., 2003
Yang, Y.-T.; Wang, Z.; Han. J.-H.; Tian, H.-P.; Yang, H.-Y.,
Determination of sulfur compounds in gasoline fraction of microreactor products by gas chromatography - Atomic emission detector,
Petrochemical Technology (Shiyou Huagong), 2003, 32, 11, 995-998. [all data]
Guevas A.P. and Tellez, 1977
Guevas A.P.; Tellez, J.V.G.,
Determination de mercaptanos de C2 a C4 an muestras gaseosas de hydrocarburos de C4 a C5 por chromatographia en fase vapor,
Revista de Instituto Mexicano di Petroleo, 1977, 9, 1, 85-88. [all data]
Zenkevich, 1998
Zenkevich, I.G.,
The Principle of Structural Analogy in the Calculation of Gas Chromatographic Retention Indices using Physico-Chemical Constants of Organic Compounds,
Zh. Anal. Khim. (Rus.), 1998, 53, 1, 43-49. [all data]
Zenkevich and Kuznetsova, 1990
Zenkevich, I.G.; Kuznetsova, L.M.,
Logic Criteria on Prediction of Gas Chromatographic Retention Indices from Physico-Chemical Properties of Organic Compounds,
Dokl. Akad. Nauk SSSR, 1990, 315, 4, 881-885. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Gas Chromatography, References
- Symbols used in this document:
AE Appearance energy ΔfH°gas Enthalpy of formation of gas 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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