return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Experimental > One molecule all properties

Experimental data for CH2SHCH2SH (1,2-Ethanedithiol)

22 02 02 11 45
Other names
α-Ethylene dimercaptan; 1,2-Dimercaptoethane; 1,2-Ethanedithiol; 1,2-Ethanethiol; A-ethylene dimercaptan; Dithioethyleneglycol; Dithioglycol; Ethanedithiol; Ethyl hydropersulfide; Ethylene dithioglycol; Ethylene glycol, dithio-; Ethylenedimercaptan; Ethylenedithiol; s-Ethylene dimercaptan; alpha-Ethylene dimercaptan; ethane-1,2-dithiol;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H6S2/c3-1-2-4/h3-4H,1-2H2 VYMPLPIFKRHAAC-UHFFFAOYSA-N SCCS ethane-1,2-dithiol
State Conformation
1Ag C2H
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 -9.33 1.09 kJ mol-1 webbook
Hfg(0K) enthalpy of formation   1.09 kJ mol-1 webbook
Entropy (298.15K) entropy     J K-1 mol-1  
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity     kJ mol-1  
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

Calculated vibrational frequencies for CH2SHCH2SH (1,2-Ethanedithiol).
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
0.30996 0.07469 0.06456 1984Nan/Chu:1051 gauche conformer

Calculated rotational constants for CH2SHCH2SH (1,2-Ethanedithiol).
Product of moments of inertia moments of inertia
3204967amu3Å6   1.4675454153924E-113gm3 cm6
Geometric Data
picture of 1,2-Ethanedithiol

Point Group C2h


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
rCH 1.120   1 9 1976Hellwege(II/7)
rSH 1.400   3 5 1976Hellwege(II/7)
rCC 1.530   1 2 1976Hellwege(II/7)
rCS 1.819   1 4 1976Hellwege(II/7)
aCCS 112 1 2 3 1976Hellwege(II/7)
aHCS 107 3 2 7 1976Hellwege(II/7)
aHSC 90.5 1 4 6 1976Hellwege(II/7)
dSCCS 180 3 2 1 4 1976Hellwege(II/7)

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for CH2SHCH2SH (1,2-Ethanedithiol).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 4
H-S 2
C-C 1
C-S 2

Connectivity
Atom 1 Atom 2
C1 C2
C1 S4
C1 H9
C1 H10
C2 S3
C2 H7
C2 H8
S3 H5
S4 H6
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1Ag

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
9.300   9.350   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 1Ag C2h True           C2h 0 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 CH2SHCH2SH (1,2-Ethanedithiol).
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 1Ag C2h True       C2h 0 3

Calculated electric quadrupole moments for CH2SHCH2SH (1,2-Ethanedithiol).

References
By selecting the following links, you may be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].
squib reference DOI
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.  
1984Nan/Chu:1051 Nandi, R.N.; Su, C.F.; Marlin, D.H. "Microwave spectrum, dipole moment, and conformation of ethanedithiol." Journal of Chemical Physics. 81, 1051-1053 (1984) 10.1063/1.447743
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

Got a better number? Please email us at [email protected]


Browse
PreviousNext