1,2-Ethanedithiol
- Formula: C2H6S2
- Molecular weight: 94.199
- IUPAC Standard InChIKey: VYMPLPIFKRHAAC-UHFFFAOYSA-N
- CAS Registry Number: 540-63-6
- 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: s-Ethylene dimercaptan; Dithioethyleneglycol; Dithioglycol; Ethylene dithioglycol; Ethylene glycol, dithio-; Ethylenedimercaptan; Ethylenedithiol; 1,2-Dimercaptoethane; 1,2-Ethanethiol; Ethane-1,2-dithiol; 1,2-Dithiolethane; NSC 60481
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Phase change 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 as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 419.2 | K | N/A | Weast and Grasselli, 1989 | BS |
Tboil | 419.2 | K | N/A | Majer and Svoboda, 1985 | |
Tboil | 418. | K | N/A | Zinner, 1953 | Uncertainty assigned by TRC = 4. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 10.68 | kcal/mol | N/A | Majer and Svoboda, 1985 | |
ΔvapH° | 10.68 ± 0.03 | kcal/mol | V | Mansson and Sunner, 1962 | hf298_H2SO4.115=-212.24 kcal/mol; ALS |
ΔvapH° | 10.7 | kcal/mol | N/A | Mansson and Sunner, 1962 | DRB |
ΔvapH° | 10.7 | kcal/mol | N/A | Mansson and Sunner, 1962 | AC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Reference |
---|---|---|
9.065 | 419.2 | Majer and Svoboda, 1985 |
Gas phase ion energetics data
Go To: Top, Phase change 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 as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
View reactions leading to C2H6S2+ (ion structure unspecified)
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.3 | PI | Butler, Baer, et al., 1983 | LBLHLM |
9.0 | PE | Kimura, Katsumata, et al., 1981 | LLK |
9.35 | PE | Kimura, Katsumata, et al., 1981 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C2H5S+ | 10.4 ± 0.15 | SH | EI | Broer, Weringa, et al., 1979 | LLK |
Gas Chromatography
Go To: Top, Phase change 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 |
---|---|---|---|---|---|
Packed | Apiezon M | 130. | 844. | Garbuzov, Misharina, et al., 1985 | He or N2, Chromosorb W, AW-DMCS; Column length: 2.1 m |
Packed | SE-30 | 110. | 801. | Möckel and Zolg, 1977 | Chromosorb W AW (80-100 mesh); Column length: 2. m |
Kovats' RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Apiezon M | 844. | Zhu, Wang, et al., 2007 | Program: not specified |
Kovats' RI, polar column, isothermal
Column type | Active phase | Temperature (C) | I | Reference | Comment |
---|---|---|---|---|---|
Packed | Carbowax 20M | 110. | 1344. | Möckel and Zolg, 1977 | He, Chromosorb W AW (80-100 mesh); Column length: 6. m |
Kovats' RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | PEG-20M | 1348. | Zhu, Wang, et al., 2007 | Program: not specified |
Van Den Dool and Kratz RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-5 | 815. | Engel and Schieberle, 2002 | 30. m/0.32 mm/0.25 μm, He; Program: 40C (2min) => 40C/min => 60C (1min) => 6C/min => 230C (15min) |
Van Den Dool and Kratz RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | FFAP | 1330. | Engel and Schieberle, 2002 | 30. m/0.32 mm/0.25 μm, He; Program: 40C (2min) => 40C/min => 60C (1min) => 6C/min => 230C (15min) |
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | OV-101 | 805. | Zenkevich, 2005 | 25. m/0.20 mm/0.10 μm, N2/He, 6. K/min; Tstart: 50. C; Tend: 250. C |
Normal alkane RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 1318. | Umano, Hagi, et al., 1995 | He, 40. C @ 2. min, 2. K/min; Column length: 60. m; Column diameter: 0.25 mm; Tend: 200. C |
References
Go To: Top, Phase change 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.
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]
Majer and Svoboda, 1985
Majer, V.; Svoboda, V.,
Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]
Zinner, 1953
Zinner, H.,
Perparation of Mercaptans,
Chem. Ber., 1953, 86, 825. [all data]
Mansson and Sunner, 1962
Mansson, M.; Sunner, S.,
Heats of combustion and formation of the n-Alkane-αω-dithiols from ethane through pentane,
Acta Chem. Scand., 1962, 16, 1863-1869. [all data]
Butler, Baer, et al., 1983
Butler, J.J.; Baer, T.; Evans, S.A., Jr.,
Energetics and structures of organosulfur ions: CH3SSCH3+, CH3SS+, C2H5S+, and CH2SH+,
J. Am. Chem. Soc., 1983, 105, 3451. [all data]
Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S.,
Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules
in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]
Broer, Weringa, et al., 1979
Broer, W.J.; Weringa, W.D.; Nieuwpoort, W.C.,
Rearrangements and fragmentations of [C2H5S]+ ions,
Org. Mass Spectrom., 1979, 14, 543. [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]
Möckel and Zolg, 1977
Möckel, H.J.; Zolg, M.,
Retentionsindices n-aliphatischer Schwefelverbindungen,
Z. Anal. Chem., 1977, 285, 1, 45-46, https://doi.org/10.1007/BF00446017
. [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]
Engel and Schieberle, 2002
Engel, W.; Schieberle, P.,
Identification and quantitation of key aroma compounds formed in Maillard-type reactions of fructose with cysteamine or isothiaproline (1,3-thiazolidine-2-carboxylic acid),
J. Agric. Food Chem., 2002, 50, 19, 5394-5399, https://doi.org/10.1021/jf0203186
. [all data]
Zenkevich, 2005
Zenkevich, I.G.,
Experimentally measured retention indices., 2005. [all data]
Umano, Hagi, et al., 1995
Umano, K.; Hagi, Y.; Nakahara, K.; Shyoji, A.; Shibamoto, T.,
Volatile chemicals formed in the headspace of a heated D-glucose/L-cysteine Maillard model system,
J. Agric. Food Chem., 1995, 43, 8, 2212-2218, https://doi.org/10.1021/jf00056a046
. [all data]
Notes
Go To: Top, Phase change data, Gas phase ion energetics data, Gas Chromatography, References
- Symbols used in this document:
AE Appearance energy Tboil Boiling point ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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