Disulfide, dimethyl

• Formula: C₂H₆S₂
• Molecular weight: 94.199
• IUPAC Standard InChI: InChI=1S/C2H6S2/c1-3-4-2/h1-2H3 Copy

  
• IUPAC Standard InChIKey: WQOXQRCZOLPYPM-UHFFFAOYSA-N Copy
• CAS Registry Number: 624-92-0
• 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: 2,3-Dithiabutane; Methyl disulfide; (Methyldithio)methane; Dimethyl disulfide; Dimethyl disulphide; (CH3S)2; UN 2381; DMDS; Sulfa-Hitech; NSC 9370; (Methyldisulfanyl)methane
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• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • UV/Visible spectrum
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase thermochemistry data

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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

Condensed phase thermochemistry data

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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

Constant pressure heat capacity of liquid

Phase change data

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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
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Enthalpy of vaporization

Δ_vapH = A exp(-βT_r) (1 − T_r)^β
    Δ_vapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    T_r = reduced temperature (T / T_c)

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Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Enthalpy of fusion

Entropy of fusion

Reaction thermochemistry data

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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

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

 +  = 2

By formula: C₄H₁₀S₂ + C₂H₆S₂ = 2C₃H₈S₂

Henry's Law data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Rolf Sander

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

Gas phase ion energetics data

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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
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to C₂H₆S₂⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

Appearance energy determinations

IR Spectrum

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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

Gas Phase Spectrum

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Additional Data

Mass spectrum (electron ionization)

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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

Spectrum

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Additional Data

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Voronkov, Klyuchnikov, et al., 1989
Voronkov, M.G.; Klyuchnikov, V.A.; Kolabin, S.N.; Shvets, G.N.; Varusin, P.I.; Deryagina, E.N.; Korchevin, N.A.; Tsvetnitskaya, S.I., Thermochemical properties of diorganyl chalcogenides and dichalcogenides RM_nR(M = S, Se, Te; n = 1, 2)., Dokl. Phys. Chem. (Engl. Transl.), 1989, 307, 650-653, In original 1139. [all data]

Hawari, Griller, et al., 1986
Hawari, J.A.; Griller, D.; Lossing, F.P., Thermochemistry of perthiyl radicals, J. Am. Chem. Soc., 1986, 108, 3273-3275. [all data]

Hubbard, Douslin, et al., 1958
Hubbard, W.N.; Douslin, D.R.; McCullough, J.P.; Scott, D.W.; Todd, S.S.; Messerly, J.F.; Hossenlopp, I.A.; George, A.; Waddington, G., 2,3-dithiabutane, 3,4-dithiahexane and 4,5-dithiaoctane: Chemical thermodynamic properties from 0 to 1000°K, J. Am. Chem. Soc., 1958, 80, 3547-3554. [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]

Scott, Finke, et al., 1950
Scott, D.W.; Finke, H.L.; Gross, M.E.; Guthrie, G.B.; Huffman, H.M., 2,3-Dithiabutane: low temperature heat capacity, heat of fusion, heat of vaporization, vapor pressure, entropy and thermodynamic functions, J. Am. Chem. Soc., 1950, 72, 2424-2430. [all data]

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]

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Pryor, W.A.; Platt, P.K., Reaction of radicals V. Reaction of Phenyl Radicals with Aliphatic Disulfides, J. Am. Chem. Soc., 1963, 85, 1496. [all data]

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Mcallan, D.T.; Cullum, T.V.; Dean, R.A.; Fidler, F.A., The Preparation and Properties of Sulfur Compounds Related to Petroleum I. The Dialkyl Sulfides and Disulfides, J. Am. Chem. Soc., 1951, 73, 3627-32. [all data]

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Scott, Finke, et al., 1950, 2
Scott, D.W.; Finke, H.L.; Gross, M.E.; Guthrie, G.B.; Huffman, H.M., 2,3-Dithiabutane: Low Temperature Heat Capacity, Heat of Fusion, Heat of Vaporization, Vapor Pressure, Entropy and Thermodynamic Functions, J. Am. Chem. Soc., 1950, 72, 2424-30. [all data]

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Anselme, M.J.; Teja, A.S., The critical properties of rapidly reacting substances, AIChE Symp. Ser., 1990, 86, 279, 128-32. [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]

White, Barnard--Smith, et al., 1952
White, P.T.; Barnard--Smith, D.G.; Fidler, F.A., Vapor Pressure--Temperature Relationships of Sulfur Compounds Related to Petroleum, Ind. Eng. Chem., 1952, 44, 6, 1430-1438, https://doi.org/10.1021/ie50510a064 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Haraldson, Olander, et al., 1960
Haraldson, L.; Olander, C.J.; Sunner, S.; Varde, K., Equilibrium studies on the disproportionation reaction between some dialkyl disulfides, Acta Chem. Scand., 1960, 14, 1509-1514. [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]

Carles, Lecomte, et al., 2001
Carles, S.; Lecomte, F.; Schermann, J.P.; Desfrancois, C.; Xu, S.; Nilles, J.M.; Bowen, K.H.; Berges, J.; Houe, Nondissociative electron capture by disulfide bonds, J. Phys. Chem. A, 2001, 105, 23, 5622-5626, https://doi.org/10.1021/jp0040603 . [all data]

Rinden, Maricq, et al., 1989
Rinden, E.; Maricq, M.M.; Grabowski, J.J., Gas-Phase Ion-Molecule Reactions of the Nitric Oxide Anion, J. Am. Chem. Soc., 1989, 111, 4, 1203, https://doi.org/10.1021/ja00186a006 . [all data]

Leeck and Kenttamaa, 1994
Leeck, D.T.; Kenttamaa, H.I., Heat of formation of the radical cation of dimethyl disulfide, Org. Mass Spectrom., 1994, 29, 106. [all data]

Li, Chiu, et al., 1993
Li, W.-K.; Chiu, S.-W.; Ma, Z.-X.; Liao, C.L.; Ng, C.Y., Adiabatic ionization energy of CH₃SSCH₃, J. Chem. Phys., 1993, 99, 8440. [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]

Colton and Rabalais, 1974
Colton, R.J.; Rabalais, J.W., Photoelectron electronic absorption spectra of SCl₂, S₂Cl₂, S₂Br₂ and (CH₃)₂S₂, J. Electron Spectrosc. Relat. Phenom., 1974, 3, 345. [all data]

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Cullen, W.R.; Frost, D.C.; Vroom, D.A., Ionization potentials of some sulfur compounds, Inorg. Chem., 1969, 8, 1803. [all data]

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Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

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Chang, F.C.; Young, V.Y.; Prather, J.W.; Cheng, K.L., Study of methyl chalcogen compounds with ultraviolet photoelectron spectroscopy, J. Electron Spectrosc. Relat. Phenom., 1986, 40, 363. [all data]

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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]

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Kobayashi, T., A new rule for photoelectron angular distributions of molecules, Phys. Lett. A, 1978, 69, 31. [all data]

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Kimura, K.; Osafune, K., Photoelectron spectroscopic study of skew compounds. III. N,N'-dimethylhydrazine, dimethyl peroxide, and dimethyl disulfide, Bull. Chem. Soc. Jpn., 1975, 48, 2421. [all data]

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Cullen, W.R.; Frost, D.C.; Pun, M.T., Mass spectra, appearance potentials, heats of formation, and bond energies of some alkyl and perfluoroalkyl sulfides, Inorg. Chem., 1970, 9, 1976. [all data]

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Ma, Z.-X.; Liao, C.L.; Ng, C.Y.; Cheung, Y.-S.; Li, W.-K.; Baer, T., Experimental and theoretical studies of isomeric CH₃S₂ and CH₃S₂⁺, J. Chem. Phys., 1994, 100, 4870. [all data]

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Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  AE	Appearance energy
  Cp,liquid	Constant pressure heat capacity of liquid
  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  S°liquid	Entropy of liquid at standard conditions
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH(+) ion,0K	Enthalpy of formation of positive ion at 0K
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔrH°	Enthalpy of reaction at standard conditions
  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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