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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CCSD/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-476.083661
Energy at 298.15K-476.088149
HF Energy-475.564490
Nuclear repulsion energy101.120258
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/6-31G(2df,p)
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 3190 3016 8.82      
2 A1 1523 1440 4.53      
3 A1 1163 1100 1.99      
4 A1 1071 1013 0.17      
5 A1 662 626 24.24      
6 A2 3273 3095 0.00      
7 A2 1216 1149 0.00      
8 A2 918 868 0.00      
9 B1 3287 3108 1.78      
10 B1 979 926 3.51      
11 B1 845 799 0.42      
12 B2 3186 3012 7.70      
13 B2 1496 1414 0.18      
14 B2 1103 1043 26.46      
15 B2 705 667 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 12308.3 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 11637.5 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/6-31G(2df,p)
ABC
0.73491 0.36016 0.26756

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.864
C2 0.000 0.742 -0.795
C3 0.000 -0.742 -0.795
H4 -0.914 1.254 -1.072
H5 0.914 1.254 -1.072
H6 0.914 -1.254 -1.072
H7 -0.914 -1.254 -1.072

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81731.81732.48132.48132.48132.4813
C21.81731.48481.08341.08342.21322.2132
C31.81731.48482.21322.21321.08341.0834
H42.48131.08342.21321.82753.10352.5084
H52.48131.08342.21321.82752.50843.1035
H62.48132.21321.08343.10352.50841.8275
H72.48132.21321.08342.50843.10351.8275

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.888 S1 C2 H4 115.256
S1 C2 H5 115.256 S1 C3 C2 65.888
S1 C3 H6 115.256 S1 C3 H7 115.256
C2 S1 C3 48.224 C2 C3 H6 118.189
C2 C3 H7 118.189 C3 C2 H4 118.189
C3 C2 H5 118.189 H4 C2 H5 115.000
H6 C3 H7 115.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability