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Experimental data for CH3SCH3 (Dimethyl sulfide)

22 02 02 11 45
Other names
2-Thiapropane; 2-Thiopropane; Dimethyl monosulfide; Dimethyl sulfide; Dimethyl sulphide; Dimethyl thioether; Dimethylsulfid; DMS; Exact-S; Methane, thiobis-; Methyl Monosulfide; Methyl sulfide; Methyl sulphide; Methylthiomethane; Sulfure de methyle; Thiobismethane; dimethylsulfane;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H6S/c1-3-2/h1-2H3 QMMFVYPAHWMCMS-UHFFFAOYSA-N CSC dimethylsulfane
State Conformation
1A1 C2V
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation -37.50 2.00 kJ mol-1 webbook
Hfg(0K) enthalpy of formation   2.00 kJ mol-1 webbook
Entropy (298.15K) entropy 285.96   J K-1 mol-1 TRC
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 15.72   kJ mol-1 TRC
Heat Capacity (298.15K) heat capacity 74.06   J K-1 mol-1 TRC
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A1 2997   1994Ell/Ste:913-928      
2 A1 2925          
3 A1 1447          
4 A1 1337          
5 A1 1030          
6 A1 695          
7 A1 280          
8 A2 2970   1994Ell/Ste:913-928      
9 A2 1427          
10 A2 946          
11 A2 175          
12 B1 2970   1994Ell/Ste:913-928       B1 B2 switched
13 B1 1439          
14 B1 973          
15 B1 183          
16 B2 2999   1994Ell/Ste:913-928       B1 B2 switched
17 B2 2919          
18 B2 1442          
19 B2 1315          
20 B2 903          
21 B2 742          

vibrational zero-point energy: 16057.0 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for CH3SCH3 (Dimethyl sulfide).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.59406 0.25421 0.19073 1966Herzberg

Calculated rotational constants for CH3SCH3 (Dimethyl sulfide).
Product of moments of inertia moments of inertia
166321.2amu3Å6   7.61580132115687E-115gm3 cm6
Geometric Data
picture of Dimethyl sulfide

Point Group C2v


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rCS 1.802   1 2 1961Pie/Hay:479-485
rCH 1.091   2 4 1961Pie/Hay:479-485
aCSC 98.9 2 1 3 1961Pie/Hay:479-485
aHCH 109.6 4 2 6 1961Pie/Hay:479-485

Cartesians
Atom x (Å) y (Å) z (Å)
S1 0.0000 0.5892 0.0000
C2 1.3692 -0.5828 0.0000
C3 -1.3692 -0.5828 0.0000
H4 2.2861 0.0081 0.0000
H5 -2.2861 0.0081 0.0000
H6 1.3392 -1.2114 0.8909
H7 1.3392 -1.2114 -0.8909
H8 -1.3392 -1.2114 -0.8909
H9 -1.3392 -1.2114 0.8909

Atom - Atom Distances bond lengths
Distances in Å
  S1 C2 C3 H4 H5 H6 H7 H8 H9
S1   1.80231.80232.35882.35882.41442.41442.41442.4144
C2 1.8023   2.73841.09083.70281.09081.09082.91962.9196
C3 1.80232.7384   3.70281.09082.91962.91961.09081.0908
H4 2.35881.09083.7028   4.57221.78261.78263.92733.9273
H5 2.35883.70281.09084.5722   3.92733.92731.78261.7826
H6 2.41441.09082.91961.78263.9273   1.78183.21692.6784
H7 2.41441.09082.91961.78263.92731.7818   2.67843.2169
H8 2.41442.91961.09083.92731.78263.21692.6784   1.7818
H9 2.41442.91961.09083.92731.78262.67843.21691.7818  

Calculated geometries for CH3SCH3 (Dimethyl sulfide).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
S1 C2 H4 106.637 S1 C2 H6 110.724
S1 C2 H7 110.724 S1 C3 H5 106.637
S1 C3 H8 110.724 S1 C3 H9 110.724
C2 S1 C3 98.875 H4 C2 H6 109.591
H4 C2 H7 109.591 H5 C3 H8 109.591
H5 C3 H9 109.591 H6 C2 H7 109.527
H8 C3 H9 109.527

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-S 2
H-C 6

Connectivity
Atom 1 Atom 2
S1 C2
S1 C3
C2 H4
C2 H6
C2 H7
C3 H5
C3 H8
C3 H9
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
8.690 0.020 8.720   webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A1 C2v True       1.500 1961Pie/Hay:479-485 MW +-0.01 μ0 C2v 1 2
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for CH3SCH3 (Dimethyl sulfide).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A1 C2v True -1.700 3.200 -1.500 1984Gra/Gub +-0.8, +-0.5, +-0.5 C2v 1 2

Calculated electric quadrupole moments for CH3SCH3 (Dimethyl sulfide).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
7.550   1984Gra/Gub

Calculated electric dipole polarizability for CH3SCH3 (Dimethyl sulfide).

References
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squib reference DOI
1961Pie/Hay:479-485 L Pierce, M Hayashi "Microwave Spectrum, Dipole Moment, Structure, and Internal Rotation of Dimethyl Sulfide" J. Chem. Phys. 35, 479 (1961) 10.1063/1.1731956
1966Herzberg Herzberg, G., Electronic spectra and electronic structure of polyatomic molecules,Van Nostrand,New York, 1966  
1984Gra/Gub CG Gray, KE Gubbins "Theory of molecular fluids. Volume 1:Fundamentals" Clarendon Press, Oxford 1984  
1994Ell/Ste:913-928 J Ellwood, D Steele "Vibrational absorption intensities in chemical analysis--VIII. Dimethyl sulphide" Spectrochimica Acta, Vol. 50A, No. 5, pp. 913-928, 1994 10.1016/0584-8539(94)80140-1
TRC Frenkel, M; Marsh, K.N.; Wilhoit, R.C.; Kabo, G.J.; Roganov, G.N.,Thermodynamics of Organic Compounds in the Gas State,Thermodynamics Research Center, College Station, TX, 1994  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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