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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CCSD(T)/cc-pVQZ

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)/cc-pVQZ
 hartrees
Energy at 0K-476.223879
Energy at 298.15K-476.228327
HF Energy-475.620083
Nuclear repulsion energy101.152643
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)/cc-pVQZ
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 3143 3048        
2 A1 1499 1454        
3 A1 1141 1106        
4 A1 1045 1013        
5 A1 643 624        
6 A2 3228 3130        
7 A2 1199 1162        
8 A2 903 875        
9 B1 3241 3143        
10 B1 960 931        
11 B1 832 807        
12 B2 3140 3045        
13 B2 1474 1429        
14 B2 1072 1039        
15 B2 681 661        

Unscaled Zero Point Vibrational Energy (zpe) 12099.4 cm-1
Scaled (by 0.9697) Zero Point Vibrational Energy (zpe) 11732.8 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)/cc-pVQZ
ABC
0.73729 0.35943 0.26753

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.865
C2 0.000 0.742 -0.797
C3 0.000 -0.742 -0.797
H4 -0.915 1.249 -1.070
H5 0.915 1.249 -1.070
H6 0.915 -1.249 -1.070
H7 -0.915 -1.249 -1.070

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82071.82072.47882.47882.47882.4788
C21.82071.48331.08131.08132.20782.2078
C31.82071.48332.20782.20781.08131.0813
H42.47881.08132.20781.83023.09662.4978
H52.47881.08132.20781.83022.49783.0966
H62.47882.20781.08133.09662.49781.8302
H72.47882.20781.08132.49783.09661.8302

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.962 S1 C2 H4 114.938
S1 C2 H5 114.938 S1 C3 C2 65.962
S1 C3 H6 114.938 S1 C3 H7 114.938
C2 S1 C3 48.076 C2 C3 H6 117.976
C2 C3 H7 117.976 C3 C2 H4 117.976
C3 C2 H5 117.976 H4 C2 H5 115.622
H6 C3 H7 115.622
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability