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Experimental data for CH3CHS (Thioacetaldehyde)

22 02 02 11 45
Other names
Thioacetaldehyde; ethanethial;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H4S/c1-2-3/h2H,1H3 QJFUMFCCMJJLIE-UHFFFAOYSA-N CC=S ethanethial
State Conformation
1A' C1
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 50.00 8.00 kJ mol-1 webbook
Hfg(0K) enthalpy of formation   8.00 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 CH3CHS (Thioacetaldehyde).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
       

Calculated rotational constants for CH3CHS (Thioacetaldehyde).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of Thioacetaldehyde

Point Group Cs


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 1.610   1 3 1987Kuchitsu(II/15)
rCH 1.089   1 4 1987Kuchitsu(II/15) C has =S
rCC 1.506   1 2 1987Kuchitsu(II/15)
rCH 1.090   2 5 1987Kuchitsu(II/15) in plane H
rCH 1.098   2 6 1987Kuchitsu(II/15) out of plane H
aCCS 125.28 2 1 3 1987Kuchitsu(II/15)
aHCC 119.4 2 1 4 1987Kuchitsu(II/15) to single H
aHCC 111.2 1 2 5 1987Kuchitsu(II/15) to in plane H
aHCC 110.12 1 2 6 1987Kuchitsu(II/15) to out of plane H

Cartesians
Atom x (Å) y (Å) z (Å)
C1 0.0000 0.6274 0.0000
C2 -1.5051 0.6806 0.0000
S3 0.8829 -0.7189 0.0000
H4 0.5678 1.5567 0.0000
H5 -1.9349 -0.3210 0.0000
H6 -1.8643 1.2092 0.8929
H7 -1.8643 1.2092 -0.8929

Atom - Atom Distances bond lengths
Distances in Å
  C1 C2 S3 H4 H5 H6 H7
C1   1.50601.61001.08902.15492.14742.1474
C2 1.5060   2.76782.25041.09001.09801.0980
S3 1.61002.7678   2.29732.84573.47303.4730
H4 1.08902.25042.2973   3.12882.61402.6140
H5 2.15491.09002.84573.1288   1.77301.7730
H6 2.14741.09803.47302.61401.7730   1.7857
H7 2.14741.09803.47302.61401.77301.7857  

Calculated geometries for CH3CHS (Thioacetaldehyde).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
C1 C2 H5 111.200 C1 C2 H6 110.120
C1 C2 H7 110.120 C2 C1 S3 125.280
C2 C1 H4 119.400 S3 C1 H4 115.320
H5 C2 H6 108.259 H5 C2 H7 108.259
H6 C2 H7 108.815

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 1

Connectivity
Atom 1 Atom 2
C1 C2
C1 S3
C1 H4
C2 H5
C2 H6
C2 H7
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
9.300       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' C1 True           Cs 2 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 CH3CHS (Thioacetaldehyde).
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' C1 True       Cs 2 3

Calculated electric quadrupole moments for CH3CHS (Thioacetaldehyde).

References
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squib reference DOI
1987Kuchitsu(II/15) Kuchitsu (ed.), Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 15: Structure Data of Free Polyatomic Molecules. Springer-Verlag, Berlin, 1987.  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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