Dimethyl Sulfoxide

Formula: C₂H₆OS
Molecular weight: 78.133
IUPAC Standard InChI: InChI=1S/C2H6OS/c1-4(2)3/h1-2H3
IUPAC Standard InChIKey: IAZDPXIOMUYVGZ-UHFFFAOYSA-N
CAS Registry Number: 67-68-5
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:
- Dimethylsulfoxide-D6
Other names: DMSO; Methane, sulfinylbis-; Methyl sulfoxide; Demsodrox; Dimexide; Dipirartril-tropico; Dolicur; Dromisol; Durasorb; DMS 70; DMS 90; Hyadur; Infiltrina; Somipront; Sulfinylbismethane; SQ 9453; Dimethyl sulphoxide; (CH3)2SO; A 10846; Deltan; Demasorb; Demavet; Demeso; Dermasorb; Doligur; Domoso; Gamasol 90; M 176; Methylsulfinylmethane; Rimso 50; Syntexan; NSC-763; Topsym; Dimethyl sulfur oxide; Herpid; Kemsol; Sclerosol; Sulfoxide, dimethyl; Methane, 1,1'-sulfinylbis-; DMSO (methyl sulfoxide); Sulphinylbis methane
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Information on this page:
Other data available:
Data at other public NIST sites:
- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 5.0
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Condensed phase thermochemistry data

Go To: Top, Reaction thermochemistry data, Ion clustering data, Mass spectrum (electron ionization), References, Notes

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
Δ_fH°_liquid	-203.4 ± 1.4	kJ/mol	Ccr	Masuda, Nagano, et al., 1994	H2SO4 (1:115 H2O); ALS
Quantity	Value	Units	Method	Reference	Comment
Δ_cH°_liquid	-2037.3 ± 1.3	kJ/mol	Ccr	Masuda, Nagano, et al., 1994	H2SO4 (1:115 H2O); ALS
Quantity	Value	Units	Method	Reference	Comment
S°_liquid	188.78	J/mol*K	N/A	Clever and Westrum, 1970	DH

Constant pressure heat capacity of liquid

C_p,liquid (J/mol*K)	Temperature (K)	Reference	Comment
149.39	298.15	Grolier, Roux-Desgranges, et al., 1993	DH
148.28	298.15	Barta, Kooner, et al., 1989	DH
153.6	298.15	Rodante and Marrosu, 1988	DH
153.2	298.15	Lankford and Criss, 1987	DH
155.9	298.15	de Visser and Somsen, 1979	DH
155.9	298.15	De Visser, Heuvelsland, et al., 1978	DH
153.18	298.15	Clever and Westrum, 1970	T = 5 to 350 K.; DH
149.0	298.15	Kenttmaa and Lindberg, 1960	T = 298, 343 K.; DH

Reaction thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Ion clustering data, Mass spectrum (electron ionization), References, Notes

Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar
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

C₂H₅OS^- + = Dimethyl Sulfoxide

By formula: C₂H₅OS^- + H⁺ = C₂H₆OS

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1563. ± 8.8	kJ/mol	G+TS	Bartmess, Scott, et al., 1979	gas phase; value altered from reference due to change in acidity scale; B
Δ_rH°	1566. ± 9.6	kJ/mol	G+TS	Cumming and Kebarle, 1978	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1533. ± 8.4	kJ/mol	IMRE	Bartmess, Scott, et al., 1979	gas phase; value altered from reference due to change in acidity scale; B
Δ_rG°	1536. ± 8.4	kJ/mol	IMRE	Cumming and Kebarle, 1978	gas phase; B

+ Dimethyl Sulfoxide = ( • )

By formula: NO₂^- + C₂H₆OS = (NO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	80.3 ± 4.2	kJ/mol	TDAs	Sieck, 1985	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	100.	J/mol*K	N/A	Sieck, 1985	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	36. ± 4.2	kJ/mol	TDAs	Sieck, 1985	gas phase; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
36.	420.	PHPMS	Sieck, 1985	gas phase; Entropy change calculated or estimated; M

C₆H₅NO₂^- + Dimethyl Sulfoxide = (C₆H₅NO₂^- • )

By formula: C₆H₅NO₂^- + C₂H₆OS = (C₆H₅NO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	70.29 ± 0.42	kJ/mol	TDAs	Sieck, 1985	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	103.	J/mol*K	PHPMS	Sieck, 1985	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	39.7 ± 0.84	kJ/mol	TDAs	Sieck, 1985	gas phase; B
Δ_rG°	36. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

C₇H₇NO₃^- + Dimethyl Sulfoxide = (C₇H₇NO₃^- • )

By formula: C₇H₇NO₃^- + C₂H₆OS = (C₇H₇NO₃^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	68.2 ± 8.4	kJ/mol	N/A	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	94.1	J/mol*K	PHPMS	Chowdhury, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	35. ± 8.4	kJ/mol	TDAs	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

+ Dimethyl Sulfoxide = ( • )

By formula: Br^- + C₂H₆OS = (Br^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	72.38	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B,M
Δ_rH°	72.0	kJ/mol	HPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	89.5	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	45.61	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B

+ Dimethyl Sulfoxide = ( • )

By formula: I^- + C₂H₆OS = (I^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	65.69	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B,M
Δ_rH°	67.	kJ/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	90.8	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	38.5	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B

C₇H₄F₃NO₂^- + Dimethyl Sulfoxide = (C₇H₄F₃NO₂^- • )

By formula: C₇H₄F₃NO₂^- + C₂H₆OS = (C₇H₄F₃NO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	61.1 ± 8.4	kJ/mol	N/A	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	93.3	J/mol*K	PHPMS	Chowdhury, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	30. ± 8.4	kJ/mol	TDAs	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

+ Dimethyl Sulfoxide = ( • )

By formula: Cl^- + C₂H₆OS = (Cl^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	77.82	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.4	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	52.30	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B

C₂H₇OS⁺ + Dimethyl Sulfoxide = (C₂H₇OS⁺ • )

By formula: C₂H₇OS⁺ + C₂H₆OS = (C₂H₇OS⁺ • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	129.	kJ/mol	PHPMS	Lau, Saluja, et al., 1980	gas phase; switching reaction((CH3)2SOH+)(CH3)2CO; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	95.8	J/mol*K	PHPMS	Lau, Saluja, et al., 1980	gas phase; switching reaction((CH3)2SOH+)(CH3)2CO; M

(C₂H₇OS⁺ • Dimethyl Sulfoxide ) + = (C₂H₇OS⁺ • 2)

By formula: (C₂H₇OS⁺ • C₂H₆OS) + C₂H₆OS = (C₂H₇OS⁺ • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	89.1	kJ/mol	PHPMS	Lau, Saluja, et al., 1980	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	45.6	J/mol*K	PHPMS	Lau, Saluja, et al., 1980	gas phase; Entropy change is questionable; M

( • 4 Dimethyl Sulfoxide ) + = ( • 5)

By formula: (K⁺ • 4C₂H₆OS) + C₂H₆OS = (K⁺ • 5C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.1	kJ/mol	HPMS	Sunner, 1984	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	150.	J/mol*K	HPMS	Sunner, 1984	gas phase; Entropy change is questionable; M

( • 5 Dimethyl Sulfoxide ) + = ( • 6)

By formula: (K⁺ • 5C₂H₆OS) + C₂H₆OS = (K⁺ • 6C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	64.9	kJ/mol	HPMS	Sunner, 1984	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	170.	J/mol*K	HPMS	Sunner, 1984	gas phase; Entropy change is questionable; M

C₆H₄FNO₂^- + Dimethyl Sulfoxide = (C₆H₄FNO₂^- • )

By formula: C₆H₄FNO₂^- + C₂H₆OS = (C₆H₄FNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	33. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
33.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄FNO₂^- + Dimethyl Sulfoxide = (C₆H₄FNO₂^- • )

By formula: C₆H₄FNO₂^- + C₂H₆OS = (C₆H₄FNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	34. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
34.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄ClNO₂^- + Dimethyl Sulfoxide = (C₆H₄ClNO₂^- • )

By formula: C₆H₄ClNO₂^- + C₂H₆OS = (C₆H₄ClNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	31. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
31.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄FNO₂^- + Dimethyl Sulfoxide = (C₆H₄FNO₂^- • )

By formula: C₆H₄FNO₂^- + C₂H₆OS = (C₆H₄FNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	33. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
33.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄ClNO₂^- + Dimethyl Sulfoxide = (C₆H₄ClNO₂^- • )

By formula: C₆H₄ClNO₂^- + C₂H₆OS = (C₆H₄ClNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	33. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
33.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄ClNO₂^- + Dimethyl Sulfoxide = (C₆H₄ClNO₂^- • )

By formula: C₆H₄ClNO₂^- + C₂H₆OS = (C₆H₄ClNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	32. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
32.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄N₂O₄^- + Dimethyl Sulfoxide = (C₆H₄N₂O₄^- • )

By formula: C₆H₄N₂O₄^- + C₂H₆OS = (C₆H₄N₂O₄^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	18. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
18.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄N₂O₄^- + Dimethyl Sulfoxide = (C₆H₄N₂O₄^- • )

By formula: C₆H₄N₂O₄^- + C₂H₆OS = (C₆H₄N₂O₄^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	26. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
26.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄N₂O₄^- + Dimethyl Sulfoxide = (C₆H₄N₂O₄^- • )

By formula: C₆H₄N₂O₄^- + C₂H₆OS = (C₆H₄N₂O₄^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	25. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
25.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₇H₇NO₂^- + Dimethyl Sulfoxide = (C₇H₇NO₂^- • )

By formula: C₇H₇NO₂^- + C₂H₆OS = (C₇H₇NO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	36. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
36.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆F₄O₂^- + Dimethyl Sulfoxide = (C₆F₄O₂^- • )

By formula: C₆F₄O₂^- + C₂H₆OS = (C₆F₄O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	19. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
19.	343.	PHPMS	Chowdhury, 1987	gas phase; M

+ Dimethyl Sulfoxide = ( • )

By formula: C₆H₄O₂^- + C₂H₆OS = (C₆H₄O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	26. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
26.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₇H₄N₂O₂^- + Dimethyl Sulfoxide = (C₇H₄N₂O₂^- • )

By formula: C₇H₄N₂O₂^- + C₂H₆OS = (C₇H₄N₂O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	28. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
28.	343.	PHPMS	Chowdhury, 1987	gas phase; M

+ Dimethyl Sulfoxide = ( • )

By formula: K⁺ + C₂H₆OS = (K⁺ • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	130.	kJ/mol	CIDT	Klassen, Anderson, et al., 1996	RCD
Δ_rH°	150.	kJ/mol	HPMS	Sunner, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	130.	J/mol*K	HPMS	Sunner, 1984	gas phase; M

C₄H₂O₃^- + Dimethyl Sulfoxide = (C₄H₂O₃^- • )

By formula: C₄H₂O₃^- + C₂H₆OS = (C₄H₂O₃^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	28. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
28.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₇H₄N₂O₂^- + Dimethyl Sulfoxide = (C₇H₄N₂O₂^- • )

By formula: C₇H₄N₂O₂^- + C₂H₆OS = (C₇H₄N₂O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	28. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
28.	343.	PHPMS	Chowdhury, 1987	gas phase; M

2 + = 2 Dimethyl Sulfoxide

By formula: 2C₂H₆S + O₂ = 2C₂H₆OS

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-277.7 ± 0.84	kJ/mol	Cm	Douglas, 1946	liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -278.3 ± 0.8 kJ/mol; At 291°K; ALS

= Dimethyl Sulfoxide + 0.5

By formula: C₂H₆O₂S = C₂H₆OS + 0.5O₂

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	243.3 ± 0.84	kJ/mol	Cm	Douglas, 1946	liquid phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 246.9 ± 0.8 kJ/mol; At 291°K; ALS

( • 2 Dimethyl Sulfoxide ) + = ( • 3)

By formula: (Cl^- • 2C₂H₆OS) + C₂H₆OS = (Cl^- • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	62.3	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	125.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 3 Dimethyl Sulfoxide ) + = ( • 4)

By formula: (Cl^- • 3C₂H₆OS) + C₂H₆OS = (Cl^- • 4C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	61.1	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	156.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 4 Dimethyl Sulfoxide ) + = ( • 5)

By formula: (Cl^- • 4C₂H₆OS) + C₂H₆OS = (Cl^- • 5C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	57.7	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	168.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 2 Dimethyl Sulfoxide ) + = ( • 3)

By formula: (I^- • 2C₂H₆OS) + C₂H₆OS = (I^- • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	48.5	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	105.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 2 Dimethyl Sulfoxide ) + = ( • 3)

By formula: (Br^- • 2C₂H₆OS) + C₂H₆OS = (Br^- • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	56.9	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	115.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • Dimethyl Sulfoxide ) + = ( • 2)

By formula: (Cl^- • C₂H₆OS) + C₂H₆OS = (Cl^- • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.9	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	99.6	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • Dimethyl Sulfoxide ) + = ( • 2)

By formula: (I^- • C₂H₆OS) + C₂H₆OS = (I^- • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	53.6	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.0	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • Dimethyl Sulfoxide ) + = ( • 2)

By formula: (Br^- • C₂H₆OS) + C₂H₆OS = (Br^- • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	60.7	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	93.7	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

+ Dimethyl Sulfoxide = ( • )

By formula: Na⁺ + C₂H₆OS = (Na⁺ • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	130.	kJ/mol	CID	Klassen, Anderson, et al., 1996	RCD

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
130.	298.	IMRE	McMahon and Ohanessian, 2000	Anchor alanine=39.89; RCD

( • 2 Dimethyl Sulfoxide ) + = ( • 3)

By formula: (K⁺ • 2C₂H₆OS) + C₂H₆OS = (K⁺ • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	84.	kJ/mol	HPMS	Sunner, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	120.	J/mol*K	HPMS	Sunner, 1984	gas phase; M

( • 3 Dimethyl Sulfoxide ) + = ( • 4)

By formula: (K⁺ • 3C₂H₆OS) + C₂H₆OS = (K⁺ • 4C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	67.	kJ/mol	HPMS	Sunner, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	130.	J/mol*K	HPMS	Sunner, 1984	gas phase; M

( • Dimethyl Sulfoxide ) + = ( • 2)

By formula: (K⁺ • C₂H₆OS) + C₂H₆OS = (K⁺ • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	120.	kJ/mol	HPMS	Sunner, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	140.	J/mol*K	HPMS	Sunner, 1984	gas phase; M

C₇H₄N₂O₂^- + Dimethyl Sulfoxide = (C₇H₄N₂O₂^- • )

By formula: C₇H₄N₂O₂^- + C₂H₆OS = (C₇H₄N₂O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.9	kJ/mol	PHPMS	Chowdhury, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	141.	J/mol*K	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄NO₃^- + Dimethyl Sulfoxide = (C₆H₄NO₃^- • )

By formula: C₆H₄NO₃^- + C₂H₆OS = (C₆H₄NO₃^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	31. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

C₆H₄NO₃^- + Dimethyl Sulfoxide = (C₆H₄NO₃^- • )

By formula: C₆H₄NO₃^- + C₂H₆OS = (C₆H₄NO₃^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	25. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

+ Dimethyl Sulfoxide = C₁₂H₁₂O₃S^-

By formula: C₁₀H₆O₂^- + C₂H₆OS = C₁₂H₁₂O₃S^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	24. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

F₆S^- + Dimethyl Sulfoxide = (F₆S^- • )

By formula: F₆S^- + C₂H₆OS = (F₆S^- • C₂H₆OS)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
30.	308.	PHPMS	Knighton, Zook, et al., 1990	gas phase; M

+ Dimethyl Sulfoxide = ( • )

By formula: C₇F₁₄^- + C₂H₆OS = (C₇F₁₄^- • C₂H₆OS)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
32.	308.	PHPMS	Knighton, Zook, et al., 1990	gas phase; M

+ Dimethyl Sulfoxide = ( • )

By formula: C₁₀H₆O₂^- + C₂H₆OS = (C₁₀H₆O₂^- • C₂H₆OS)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
24.	343.	PHPMS	Chowdhury, 1987	gas phase; M

Ion clustering data

Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Mass spectrum (electron ionization), References, Notes

Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

+ Dimethyl Sulfoxide = ( • )

By formula: Br^- + C₂H₆OS = (Br^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	72.38	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B,M
Δ_rH°	72.0	kJ/mol	HPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	89.5	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	45.61	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B

( • Dimethyl Sulfoxide ) + = ( • 2)

By formula: (Br^- • C₂H₆OS) + C₂H₆OS = (Br^- • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	60.7	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	93.7	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 2 Dimethyl Sulfoxide ) + = ( • 3)

By formula: (Br^- • 2C₂H₆OS) + C₂H₆OS = (Br^- • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	56.9	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	115.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

C₂H₇OS⁺ + Dimethyl Sulfoxide = (C₂H₇OS⁺ • )

By formula: C₂H₇OS⁺ + C₂H₆OS = (C₂H₇OS⁺ • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	129.	kJ/mol	PHPMS	Lau, Saluja, et al., 1980	gas phase; switching reaction((CH3)2SOH+)(CH3)2CO; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	95.8	J/mol*K	PHPMS	Lau, Saluja, et al., 1980	gas phase; switching reaction((CH3)2SOH+)(CH3)2CO; M

(C₂H₇OS⁺ • Dimethyl Sulfoxide ) + = (C₂H₇OS⁺ • 2)

By formula: (C₂H₇OS⁺ • C₂H₆OS) + C₂H₆OS = (C₂H₇OS⁺ • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	89.1	kJ/mol	PHPMS	Lau, Saluja, et al., 1980	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	45.6	J/mol*K	PHPMS	Lau, Saluja, et al., 1980	gas phase; Entropy change is questionable; M

C₄H₂O₃^- + Dimethyl Sulfoxide = (C₄H₂O₃^- • )

By formula: C₄H₂O₃^- + C₂H₆OS = (C₄H₂O₃^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	28. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
28.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆F₄O₂^- + Dimethyl Sulfoxide = (C₆F₄O₂^- • )

By formula: C₆F₄O₂^- + C₂H₆OS = (C₆F₄O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	19. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
19.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄ClNO₂^- + Dimethyl Sulfoxide = (C₆H₄ClNO₂^- • )

By formula: C₆H₄ClNO₂^- + C₂H₆OS = (C₆H₄ClNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	31. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
31.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄ClNO₂^- + Dimethyl Sulfoxide = (C₆H₄ClNO₂^- • )

By formula: C₆H₄ClNO₂^- + C₂H₆OS = (C₆H₄ClNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	33. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
33.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄ClNO₂^- + Dimethyl Sulfoxide = (C₆H₄ClNO₂^- • )

By formula: C₆H₄ClNO₂^- + C₂H₆OS = (C₆H₄ClNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	32. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
32.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄FNO₂^- + Dimethyl Sulfoxide = (C₆H₄FNO₂^- • )

By formula: C₆H₄FNO₂^- + C₂H₆OS = (C₆H₄FNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	33. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
33.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄FNO₂^- + Dimethyl Sulfoxide = (C₆H₄FNO₂^- • )

By formula: C₆H₄FNO₂^- + C₂H₆OS = (C₆H₄FNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	34. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
34.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄FNO₂^- + Dimethyl Sulfoxide = (C₆H₄FNO₂^- • )

By formula: C₆H₄FNO₂^- + C₂H₆OS = (C₆H₄FNO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	33. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
33.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄NO₃^- + Dimethyl Sulfoxide = (C₆H₄NO₃^- • )

By formula: C₆H₄NO₃^- + C₂H₆OS = (C₆H₄NO₃^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	25. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

C₆H₄NO₃^- + Dimethyl Sulfoxide = (C₆H₄NO₃^- • )

By formula: C₆H₄NO₃^- + C₂H₆OS = (C₆H₄NO₃^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	31. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

C₆H₄N₂O₄^- + Dimethyl Sulfoxide = (C₆H₄N₂O₄^- • )

By formula: C₆H₄N₂O₄^- + C₂H₆OS = (C₆H₄N₂O₄^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	18. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
18.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄N₂O₄^- + Dimethyl Sulfoxide = (C₆H₄N₂O₄^- • )

By formula: C₆H₄N₂O₄^- + C₂H₆OS = (C₆H₄N₂O₄^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	26. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
26.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₄N₂O₄^- + Dimethyl Sulfoxide = (C₆H₄N₂O₄^- • )

By formula: C₆H₄N₂O₄^- + C₂H₆OS = (C₆H₄N₂O₄^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	25. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
25.	343.	PHPMS	Chowdhury, 1987	gas phase; M

+ Dimethyl Sulfoxide = ( • )

By formula: C₆H₄O₂^- + C₂H₆OS = (C₆H₄O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	26. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
26.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₆H₅NO₂^- + Dimethyl Sulfoxide = (C₆H₅NO₂^- • )

By formula: C₆H₅NO₂^- + C₂H₆OS = (C₆H₅NO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	70.29 ± 0.42	kJ/mol	TDAs	Sieck, 1985	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	103.	J/mol*K	PHPMS	Sieck, 1985	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	39.7 ± 0.84	kJ/mol	TDAs	Sieck, 1985	gas phase; B
Δ_rG°	36. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

+ Dimethyl Sulfoxide = ( • )

By formula: C₇F₁₄^- + C₂H₆OS = (C₇F₁₄^- • C₂H₆OS)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
32.	308.	PHPMS	Knighton, Zook, et al., 1990	gas phase; M

C₇H₄F₃NO₂^- + Dimethyl Sulfoxide = (C₇H₄F₃NO₂^- • )

By formula: C₇H₄F₃NO₂^- + C₂H₆OS = (C₇H₄F₃NO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	61.1 ± 8.4	kJ/mol	N/A	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	93.3	J/mol*K	PHPMS	Chowdhury, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	30. ± 8.4	kJ/mol	TDAs	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

C₇H₄N₂O₂^- + Dimethyl Sulfoxide = (C₇H₄N₂O₂^- • )

By formula: C₇H₄N₂O₂^- + C₂H₆OS = (C₇H₄N₂O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	28. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
28.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₇H₄N₂O₂^- + Dimethyl Sulfoxide = (C₇H₄N₂O₂^- • )

By formula: C₇H₄N₂O₂^- + C₂H₆OS = (C₇H₄N₂O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	28. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
28.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₇H₄N₂O₂^- + Dimethyl Sulfoxide = (C₇H₄N₂O₂^- • )

By formula: C₇H₄N₂O₂^- + C₂H₆OS = (C₇H₄N₂O₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.9	kJ/mol	PHPMS	Chowdhury, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	141.	J/mol*K	PHPMS	Chowdhury, 1987	gas phase; M

C₇H₇NO₂^- + Dimethyl Sulfoxide = (C₇H₇NO₂^- • )

By formula: C₇H₇NO₂^- + C₂H₆OS = (C₇H₇NO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	36. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
36.	343.	PHPMS	Chowdhury, 1987	gas phase; M

C₇H₇NO₃^- + Dimethyl Sulfoxide = (C₇H₇NO₃^- • )

By formula: C₇H₇NO₃^- + C₂H₆OS = (C₇H₇NO₃^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	68.2 ± 8.4	kJ/mol	N/A	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	94.1	J/mol*K	PHPMS	Chowdhury, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	35. ± 8.4	kJ/mol	TDAs	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

+ Dimethyl Sulfoxide = ( • )

By formula: C₁₀H₆O₂^- + C₂H₆OS = (C₁₀H₆O₂^- • C₂H₆OS)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
24.	343.	PHPMS	Chowdhury, 1987	gas phase; M

+ Dimethyl Sulfoxide = C₁₂H₁₂O₃S^-

By formula: C₁₀H₆O₂^- + C₂H₆OS = C₁₂H₁₂O₃S^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	24. ± 6.7	kJ/mol	IMRE	Chowdhury, Grimsrud, et al., 1987	gas phase; Free energy affinity at 70°C.; B

+ Dimethyl Sulfoxide = ( • )

By formula: Cl^- + C₂H₆OS = (Cl^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	77.82	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.4	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	52.30	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B

( • Dimethyl Sulfoxide ) + = ( • 2)

By formula: (Cl^- • C₂H₆OS) + C₂H₆OS = (Cl^- • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.9	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	99.6	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 2 Dimethyl Sulfoxide ) + = ( • 3)

By formula: (Cl^- • 2C₂H₆OS) + C₂H₆OS = (Cl^- • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	62.3	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	125.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 3 Dimethyl Sulfoxide ) + = ( • 4)

By formula: (Cl^- • 3C₂H₆OS) + C₂H₆OS = (Cl^- • 4C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	61.1	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	156.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 4 Dimethyl Sulfoxide ) + = ( • 5)

By formula: (Cl^- • 4C₂H₆OS) + C₂H₆OS = (Cl^- • 5C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	57.7	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	168.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

F₆S^- + Dimethyl Sulfoxide = (F₆S^- • )

By formula: F₆S^- + C₂H₆OS = (F₆S^- • C₂H₆OS)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
30.	308.	PHPMS	Knighton, Zook, et al., 1990	gas phase; M

+ Dimethyl Sulfoxide = ( • )

By formula: I^- + C₂H₆OS = (I^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	65.69	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B,M
Δ_rH°	67.	kJ/mol	PHPMS	Caldwell, Masucci, et al., 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	90.8	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	38.5	kJ/mol	TDAs	Magnera, Caldwell, et al., 1984	gas phase; B

( • Dimethyl Sulfoxide ) + = ( • 2)

By formula: (I^- • C₂H₆OS) + C₂H₆OS = (I^- • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	53.6	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.0	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

( • 2 Dimethyl Sulfoxide ) + = ( • 3)

By formula: (I^- • 2C₂H₆OS) + C₂H₆OS = (I^- • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	48.5	kJ/mol	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	105.	J/mol*K	PHPMS	Magnera, Caldwell, et al., 1984	gas phase; M

+ Dimethyl Sulfoxide = ( • )

By formula: K⁺ + C₂H₆OS = (K⁺ • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	130.	kJ/mol	CIDT	Klassen, Anderson, et al., 1996	RCD
Δ_rH°	150.	kJ/mol	HPMS	Sunner, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	130.	J/mol*K	HPMS	Sunner, 1984	gas phase; M

( • Dimethyl Sulfoxide ) + = ( • 2)

By formula: (K⁺ • C₂H₆OS) + C₂H₆OS = (K⁺ • 2C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	120.	kJ/mol	HPMS	Sunner, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	140.	J/mol*K	HPMS	Sunner, 1984	gas phase; M

( • 2 Dimethyl Sulfoxide ) + = ( • 3)

By formula: (K⁺ • 2C₂H₆OS) + C₂H₆OS = (K⁺ • 3C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	84.	kJ/mol	HPMS	Sunner, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	120.	J/mol*K	HPMS	Sunner, 1984	gas phase; M

( • 3 Dimethyl Sulfoxide ) + = ( • 4)

By formula: (K⁺ • 3C₂H₆OS) + C₂H₆OS = (K⁺ • 4C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	67.	kJ/mol	HPMS	Sunner, 1984	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	130.	J/mol*K	HPMS	Sunner, 1984	gas phase; M

( • 4 Dimethyl Sulfoxide ) + = ( • 5)

By formula: (K⁺ • 4C₂H₆OS) + C₂H₆OS = (K⁺ • 5C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.1	kJ/mol	HPMS	Sunner, 1984	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	150.	J/mol*K	HPMS	Sunner, 1984	gas phase; Entropy change is questionable; M

( • 5 Dimethyl Sulfoxide ) + = ( • 6)

By formula: (K⁺ • 5C₂H₆OS) + C₂H₆OS = (K⁺ • 6C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	64.9	kJ/mol	HPMS	Sunner, 1984	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	170.	J/mol*K	HPMS	Sunner, 1984	gas phase; Entropy change is questionable; M

+ Dimethyl Sulfoxide = ( • )

By formula: NO₂^- + C₂H₆OS = (NO₂^- • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	80.3 ± 4.2	kJ/mol	TDAs	Sieck, 1985	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	100.	J/mol*K	N/A	Sieck, 1985	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	36. ± 4.2	kJ/mol	TDAs	Sieck, 1985	gas phase; B

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
36.	420.	PHPMS	Sieck, 1985	gas phase; Entropy change calculated or estimated; M

+ Dimethyl Sulfoxide = ( • )

By formula: Na⁺ + C₂H₆OS = (Na⁺ • C₂H₆OS)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	130.	kJ/mol	CID	Klassen, Anderson, et al., 1996	RCD

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
130.	298.	IMRE	McMahon and Ohanessian, 2000	Anchor alanine=39.89; RCD

Mass spectrum (electron ionization)

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Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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Origin	NIST Mass Spectrometry Data Center, 1990.
NIST MS number	118614

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References

Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Ion clustering data, Mass spectrum (electron ionization), Notes

Masuda, Nagano, et al., 1994
Masuda, N.; Nagano, Y.; Sakiyama, M., Standard molar enthalpy of formation of (CH₃)₂SO, dimethylsulfoxide, by combustion calorimetry, J. Chem. Thermodyn., 1994, 26, 971-975. [all data]

Clever and Westrum, 1970
Clever, H.L.; Westrum, E.F., Jr., Dimethylsulfoxide and dimethylsulfone. Heat capacities, enthalpies of fusion, and thermodynamic properties, J. Phys. Chem., 1970, 74, 1309-1317. [all data]

Grolier, Roux-Desgranges, et al., 1993
Grolier, J.-P.E.; Roux-Desgranges, G.; Berkane, M.; Jimenez, E.; Wilhelm, E., Heat capacities and densities of mixtures of very polar substances 2. Mixtures containing N,N-dimethylformamide, J. Chem. Thermodynam., 1993, 25(1), 41-50. [all data]

Barta, Kooner, et al., 1989
Barta, L.; Kooner, Z.S.; Hepler, L.G.; Roux-Desgranges, G.; Grolier, J.-P.E., Thermal and volumetric properties of chloroform dimethylsulfoxide: Thermodynamic analysis using the ideal associated solution model, J. Solution Chem., 1989, 18(7), 663-673. [all data]

Rodante and Marrosu, 1988
Rodante, F.; Marrosu, G., Excess molar isobaric heat capacities and excess molar enthalpies for water-dimethylsulfoxide mixtures at 25°C, Thermochim. Acta, 1988, 136, 209-218. [all data]

Lankford and Criss, 1987
Lankford, J.I.; Criss, C.M., Partial molar heat caqpacities of selected electrolytes and benzene in methanol and dimethyldulfoxide at 25, 40 and 80°C, J. Solution Chem., 1987, 16(11), 885-906. [all data]

de Visser and Somsen, 1979
de Visser, C.; Somsen, G., Thermochemical behavior of mixtures of N,N-dimethylformamide with dimethylsulfoxide, acetonitrile, and N-methylformamide: volumes and heat capacities, J. Solution Chem., 1979, 8, 593-600. [all data]

De Visser, Heuvelsland, et al., 1978
De Visser, C.; Heuvelsland, W.J.M.; Dunn, L.A.; Somsen, G., Some properties of binary aqueous liquid mixtures, J. Chem. Soc., Faraday Trans.1, 1978, 74, 1159-1169. [all data]

Kenttmaa and Lindberg, 1960
Kenttmaa, J.; Lindberg, J.J., Volumes and heats of mixing of dimethyl sulfoxide-water solutions, Suom. Kemistilehti, 1960, B33, 32-35. [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]

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]

Sieck, 1985
Sieck, L.W., Thermochemistry of Solvation of NO₂^- and C₆H₅NO₂^- by Polar Molecules in the Vapor Phase. Comparison with Cl^- and Variation with Ligand Structure., J. Phys. Chem., 1985, 89, 25, 5552, https://doi.org/10.1021/j100271a049 . [all data]

Chowdhury, Grimsrud, et al., 1987
Chowdhury, S.; Grimsrud, E.P.; Kebarle, P., Bonding of Charged Delocalized Anions to Protic and Dipolar Aprotic Solvent Molecules, J. Phys. Chem., 1987, 91, 10, 2551, https://doi.org/10.1021/j100294a021 . [all data]

Chowdhury, 1987
Chowdhury, S. Grimsrud, Bonding of Charge Delocalized Anions to Protic and Dipolar Aprotic Solvents, J. Phys. Chem., 1987, 91, 10, 2551, https://doi.org/10.1021/j100294a021 . [all data]

Magnera, Caldwell, et al., 1984
Magnera, T.F.; Caldwell, G.; Sumner, J.; Ikuta, S.; Kebarle, P., Solvation of the halide anions in dimethyl sulfoxide. Factors involved in enhanced reactivity of negative ions in dipolar aprotic solvents, J. Am. Chem. Soc., 1984, 106, 6140. [all data]

Caldwell, Masucci, et al., 1989
Caldwell, G.W.; Masucci, J.A.; Ikonomou, M.G., Negative Ion Chemical Ionization Mass Spectrometry - Binding of Molecules to Bromide and Iodide Anions, Org. Mass Spectrom., 1989, 24, 1, 8, https://doi.org/10.1002/oms.1210240103 . [all data]

Lau, Saluja, et al., 1980
Lau, Y.K.; Saluja, P.P.S.; Kebarle, P., The Proton in Dimethyl Sulfoxide and Acetone. Results from Gas - Phase Ion Equilibria Involving (Me2SO)nH+ and (Me2CO)nH+, J. Am. Chem. Soc., 1980, 102, 25, 7429, https://doi.org/10.1021/ja00545a004 . [all data]

Sunner, 1984
Sunner, J. Kebarle, Ion - Solvent Molecule Interactions in the Gas Phase. The Potassium Ion and Me2SO, DMA, DMF, and Acetone, J. Am. Chem. Soc., 1984, 106, 21, 6135, https://doi.org/10.1021/ja00333a002 . [all data]

Klassen, Anderson, et al., 1996
Klassen, J.S.; Anderson, S.G.; Blades, A.T.; Kebarle, P., Reaction Enthalpies for M+L = M+ + L, Where M+ = Na+ and K+ and L = Acetamide, N-Methylacetamide, N,N-Dimethylacetamide, Glycine, and Glycylglycine, from Determinations of the Collision-Induced Dissociation Thresholds, J. Phys. Chem., 1996, 100, 33, 14218, https://doi.org/10.1021/jp9608382 . [all data]

Douglas, 1946
Douglas, T.B., Heats of formation of liquid methyl sulfoxide and crystalline methyl sulfone at 18°, J. Am. Chem. Soc., 1946, 68, 1072-1076. [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]

McMahon and Ohanessian, 2000
McMahon, T.B.; Ohanessian, G., An Experimental and Ab Initio Study of the Nature of the Binding in Gas-Phase Complexes of Sodium Ions, Chem. Eur. J., 2000, 6, 16, 2931, https://doi.org/10.1002/1521-3765(20000818)6:16<2931::AID-CHEM2931>3.0.CO;2-7 . [all data]

Knighton, Zook, et al., 1990
Knighton, W.B.; Zook, D.R.; Grimsrud, E.P., Cluster-Assisted Decomposition Reactions of the Molecular Anions of SF6 and C7F14, J. Am. Soc. Mass Spectrom., 1990, 1, 5, 372, https://doi.org/10.1016/1044-0305(90)85017-G . [all data]

Notes

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Symbols used in this document:

C_p,liquid	Constant pressure heat capacity of liquid
S°_liquid	Entropy of liquid at standard conditions
T	Temperature
Δ_cH°_liquid	Enthalpy of combustion of liquid at standard conditions
Δ_fH°_liquid	Enthalpy of formation of liquid at standard conditions
Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions
Δ_rS°	Entropy of reaction at standard conditions

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
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Dimethyl Sulfoxide

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Condensed phase thermochemistry data

Constant pressure heat capacity of liquid

Reaction thermochemistry data

Individual Reactions

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Ion clustering data

Clustering reactions

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Free energy of reaction

Mass spectrum (electron ionization)

Spectrum

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