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Experimental data for CH3SSCH3 (Disulfide, dimethyl)

22 02 02 11 45
Other names
2,3-Dithiabutane; (Methyldithio)methane; Dimethyl disulfide; Dimethyl disulphide; Disulfide, dimethyl; Methyl disulfide; 1,2-dimethyldisulfane;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H6S2/c1-3-4-2/h1-2H3 WQOXQRCZOLPYPM-UHFFFAOYSA-N CSSC 1,2-dimethyldisulfane
State Conformation
1A C2
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 -24.10 2.30 kJ mol-1 webbook
Hfg(0K) enthalpy of formation   2.30 kJ mol-1 webbook
Entropy (298.15K) entropy 336.80   J K-1 mol-1 TRC
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 19.94   kJ mol-1 TRC
Heat Capacity (298.15K) heat capacity 94.22   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 A 2990   1969Fra:89      
2 A 2983   1969Fra:89      
3 A 2913   1969Fra:89      
4 A 1426   1969Fra:89      
5 A 1419   1969Fra:89      
6 A 1311   1969Fra:89      
7 A 955   1969Fra:89      
8 A 949   1969Fra:89      
9 A 694   1969Fra:89      
10 A 509   1969Fra:89      
11 A 240   1969Fra:89      
12 A 134   1969Fra:89      
13 A 117   1969Fra:89      
14 B 2990   1969Fra:89      
15 B 2983   1969Fra:89      
16 B 2915   1969Fra:89      
17 B 1430   1969Fra:89      
18 B 1415   1969Fra:89      
19 B 1303   1969Fra:89      
20 B 955   1969Fra:89      
21 B 949   1969Fra:89      
22 B 691   1969Fra:89      
23 B 274   1969Fra:89      
24 B 134   1969Fra:89      

vibrational zero-point energy: 16339.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for CH3SSCH3 (Disulfide, dimethyl).
Gas-phase IR spectra can be found in the NIST Chemistry Webbook here.
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.27232 0.09395 0.08574 1992Mey:99

Calculated rotational constants for CH3SSCH3 (Disulfide, dimethyl).
Product of moments of inertia moments of inertia
2184064amu3Å6   1.0000769046951E-113gm3 cm6
Geometric Data
picture of Disulfide, dimethyl

Point Group C2


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
rSS 2.038   1 2 1976Hellwege(II/7)
rCS 1.810   1 3 1976Hellwege(II/7)
rCH 1.097   3 5 1976Hellwege(II/7)
aCSS 102.8 1 2 4 1976Hellwege(II/7)
aHCS 108.9 1 3 5 1976Hellwege(II/7)
dCSSC 84.7 3 1 2 4 1976Hellwege(II/7)

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for CH3SSCH3 (Disulfide, dimethyl).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 6
C-S 2
S-S 1

Connectivity
Atom 1 Atom 2
S1 S2
S1 C3
S2 C4
C3 H5
C3 H6
C3 H7
C4 H8
C4 H9
C4 H10
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
7.400 0.100 8.970   webbook

Electron Affinity (eV)
Electron Affinity unc. reference
0.230 0.210 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 1A C2 True           C2 1 3
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 CH3SSCH3 (Disulfide, dimethyl).
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 1A C2 True       C2 1 3

Calculated electric quadrupole moments for CH3SSCH3 (Disulfide, dimethyl).

References
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squib reference DOI
1969Fra:89 Frankiss. Vibrational spectra and structures of S2(CH3)2 and Se2(CH3)2. J. Mol. Struct. Vol. 3. pgs. 89-101. 10.1016/0022-2860(69)80010-4
1976Hellwege(II/7) Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.  
1992Mey:99 M Meyer "Infrared, Raman, microwave and ab initio study of dimethyl disulfide: structure and forcefield" J. Mol. Struct. 273 (1992) 99-121 10.1016/0022-2860(92)87078-a
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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