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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/SDD
 hartrees
Energy at 0K-475.715706
Energy at 298.15K-475.720046
HF Energy-475.475600
Nuclear repulsion energy96.600089
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 MP2/SDD
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 3159 3050 10.29      
2 A1 1522 1469 0.44      
3 A1 1141 1102 0.30      
4 A1 1087 1049 10.10      
5 A1 556 536 11.57      
6 A2 3266 3152 0.00      
7 A2 1232 1189 0.00      
8 A2 907 876 0.00      
9 B1 3279 3166 12.77      
10 B1 936 904 5.95      
11 B1 866 836 1.04      
12 B2 3154 3044 13.33      
13 B2 1501 1449 3.64      
14 B2 1112 1074 67.77      
15 B2 571 551 1.96      

Unscaled Zero Point Vibrational Energy (zpe) 12143.3 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 11722.0 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 MP2/SDD
ABC
0.71303 0.31421 0.23952

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.928
C2 0.000 0.754 -0.863
C3 0.000 -0.754 -0.863
H4 -0.926 1.272 -1.125
H5 0.926 1.272 -1.125
H6 0.926 -1.272 -1.125
H7 -0.926 -1.272 -1.125

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.94361.94362.58662.58662.58662.5866
C21.94361.50881.09271.09272.24362.2436
C31.94361.50882.24362.24361.09271.0927
H42.58661.09272.24361.85173.14732.5449
H52.58661.09272.24361.85172.54493.1473
H62.58662.24361.09273.14732.54491.8517
H72.58662.24361.09272.54493.14731.8517

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.161 S1 C2 H4 113.871
S1 C2 H5 113.871 S1 C3 C2 67.161
S1 C3 H6 113.871 S1 C3 H7 113.871
C2 S1 C3 45.678 C2 C3 H6 118.299
C2 C3 H7 118.299 C3 C2 H4 118.299
C3 C2 H5 118.299 H4 C2 H5 115.838
H6 C3 H7 115.838
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability