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Experimental data for C2H4S (Thiirane)

22 02 02 11 45
Other names
2,3-Dihydrothiirene; Ethylene episulfide; Ethylene episulphide; Ethylene sulfide; Ethylene sulphide; Sulfurane; Thiacyclopropane; Thiirane; Thiirene, 2,3-dihydro-;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H4S/c1-2-3-1/h1-2H2 VOVUARRWDCVURC-UHFFFAOYSA-N S1CC1 Thiirane
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 82.38   kJ mol-1 TRC
Hfg(0K) enthalpy of formation 94.42   kJ mol-1 TRC
Entropy (298.15K) entropy 255.24   J K-1 mol-1 TRC
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 11.40   kJ mol-1 TRC
Heat Capacity (298.15K) heat capacity 53.32   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 3014   1986All/Ber:4211      
2 A1 1457   1986All/Ber:4211      
5 A1 627   1986All/Ber:4211      
11 B1 824   1986All/Ber:4211      
12 B2 3013   1986All/Ber:4211      
14 B2 1051   1986All/Ber:4211      

vibrational zero-point energy: 11703.4 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for C2H4S (Thiirane).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.73299 0.36108 0.26773 1974Oki:Hir:111

Calculated rotational constants for C2H4S (Thiirane).
Product of moments of inertia moments of inertia
67607.34amu3Å6   3.09572098252406E-115gm3 cm6
Geometric Data
picture of Thiirane

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
rCC 1.484   2 3 1998Kuc
rCH 1.083   2 4 1998Kuc
rCS 1.815   1 2 1998Kuc
aHCH 115.8 4 2 5 1998Kuc
aCSC 48.27 2 1 3 1998Kuc
aCCS 65.865 1 2 3 1998Kuc by symmetry
aHCC 117.926 0 2 3 6 1998Kuc by symmetry

Cartesians
Atom x (Å) y (Å) z (Å)
S1 0.0000 0.0000 0.8622
C2 0.0000 0.7421 -0.7942
C3 0.0000 -0.7421 -0.7942
H4 -0.9174 1.2493 -1.0661
H5 0.9174 1.2493 -1.0661
H6 0.9174 -1.2493 -1.0661
H7 -0.9174 -1.2493 -1.0661

Atom - Atom Distances bond lengths
Distances in Å
  S1 C2 C3 H4 H5 H6 H7
S1   1.81501.81502.47402.47402.47402.4740
C2 1.8150   1.48431.08301.08302.20942.2094
C3 1.81501.4843   2.20942.20941.08301.0830
H4 2.47401.08302.2094   1.83493.10002.4987
H5 2.47401.08302.20941.8349   2.49873.1000
H6 2.47402.20941.08303.10002.4987   1.8349
H7 2.47402.20941.08302.49873.10001.8349  

Calculated geometries for C2H4S (Thiirane).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
S1 C2 C3 65.865 S1 C2 H4 114.876
S1 C2 H5 114.876 S1 C3 C2 65.865
S1 C3 H6 114.876 S1 C3 H7 114.876
C2 S1 C3 48.270 C2 C3 H6 117.926
C2 C3 H7 117.926 C3 C2 H4 117.926
C3 C2 H5 117.926 H4 C2 H5 115.800
H6 C3 H7 115.800

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
C-C 1
C-S 2

Connectivity
Atom 1 Atom 2
S1 C2
S1 C3
C2 C3
C2 H4
C2 H5
C3 H6
C3 H7
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
9.050   9.050   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       1.850 NSRDS-NBS10 MW 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 C2H4S (Thiirane).
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 -0.700 1.200 -0.500 1971Fly/Ben:225 Qxx=-0.5+-0.7, Qyy=1.2+-0.8, Qzz=-0.7+-0.7 C2v 1 2

Calculated electric quadrupole moments for C2H4S (Thiirane).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
6.910   1998Gus/Rui:163

Calculated electric dipole polarizability for C2H4S (Thiirane).

References
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squib reference DOI
1971Fly/Ben:225 WH Flygare, RC Benson "The molecular Zeeman effect in diamagnetic molecules and the determination of molecular magnetic moments (g values), magnetic susceptibilities, and molecular quadrupole moments" Mol. Phys. 1971, 20 (2), 225-250 10.1080/00268977100100221
1974Oki:Hir:111 K Okiye, C Hirose, DG Lister, J Sheridan "The rs-structure of ethylene sulphide" Chem. Phys. Lett. 24(1), 111, 1974 10.1016/0009-2614(74)80228-9
1986All/Ber:4211 WD Allen, JE Bertie, MV Falk, BA Hess Jr., GB Mast, DA Othen, LJ Schaad, HF Schaefer III "The experimental vibrational spectra, vibrational assignment, and normal coordinate analysis of thiirane-h4 and -d4 and cis- and trans-1m2- thirene and isotopically substituted derivatives" J. Chem. Phys. 84(8), 4211, 1986 10.1063/1.450043
1998Gus/Rui:163 M Gussoni, R Rui, G Zerbi "Electronic and relaxation contribution to linear molecular polarizability. An analysis of the experimental values" J. Mol. Struct. 447 (1998) 163-215 10.1016/S0022-2860(97)00292-5
1998Kuc K Kuchitsu(ed) "Structure of Free Polyatomic Molecules - Basic Data" Springer, Berlin, 1998 10.1007/978-3-642-45748-7 
NSRDS-NBS10 R. D. Nelson Jr., D. R. Lide, A. A. Maryott "Selected Values of electric dipole moments for molecules in the gas phase" NSRDS-NBS10, 1967 10.6028/NBS.NSRDS.10
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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