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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CCSD(T)/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD(T)/Def2TZVPP
 hartrees
Energy at 0K-476.178676
Energy at 298.15K-476.183120
HF Energy-475.607212
Nuclear repulsion energy101.033299
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CCSD(T)/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3147 3147        
2 A1 1504 1504        
3 A1 1139 1139        
4 A1 1050 1050        
5 A1 640 640        
6 A2 3229 3229        
7 A2 1194 1194        
8 A2 906 906        
9 B1 3244 3244        
10 B1 964 964        
11 B1 834 834        
12 B2 3142 3142        
13 B2 1479 1479        
14 B2 1075 1075        
15 B2 679 679        

Unscaled Zero Point Vibrational Energy (zpe) 12112.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12112.1 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/Def2TZVPP
ABC
0.73467 0.35882 0.26685

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.866
C2 0.000 0.744 -0.797
C3 0.000 -0.744 -0.797
H4 -0.915 1.250 -1.073
H5 0.915 1.250 -1.073
H6 0.915 -1.250 -1.073
H7 -0.915 -1.250 -1.073

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82241.82242.48252.48252.48252.4825
C21.82241.48721.08171.08172.21092.2109
C31.82241.48722.21092.21091.08171.0817
H42.48251.08172.21091.83033.09842.5000
H52.48251.08172.21091.83032.50003.0984
H62.48252.21091.08173.09842.50001.8303
H72.48252.21091.08172.50003.09841.8303

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.918 S1 C2 H4 115.088
S1 C2 H5 115.088 S1 C3 C2 65.918
S1 C3 H6 115.088 S1 C3 H7 115.088
C2 S1 C3 48.164 C2 C3 H6 117.915
C2 C3 H7 117.915 C3 C2 H4 117.915
C3 C2 H5 117.915 H4 C2 H5 115.557
H6 C3 H7 115.557
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability