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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-475.915385
Energy at 298.15K-475.919935
HF Energy-475.546612
Nuclear repulsion energy101.440791
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 CISD/6-31G*
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 3245 3005 11.04      
2 A1 1587 1470 4.94      
3 A1 1210 1120 3.73      
4 A1 1117 1034 0.45      
5 A1 688 637 28.27      
6 A2 3324 3077 0.00      
7 A2 1256 1163 0.00      
8 A2 964 892 0.00      
9 B1 3337 3089 6.08      
10 B1 1026 949 4.68      
11 B1 879 814 0.42      
12 B2 3239 2999 11.86      
13 B2 1554 1439 0.24      
14 B2 1157 1071 37.85      
15 B2 731 676 1.07      

Unscaled Zero Point Vibrational Energy (zpe) 12656.4 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 11717.3 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 CISD/6-31G*
ABC
0.73996 0.36226 0.26919

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.863
C2 0.000 0.740 -0.791
C3 0.000 -0.740 -0.791
H4 -0.911 1.250 -1.076
H5 0.911 1.250 -1.076
H6 0.911 -1.250 -1.076
H7 -0.911 -1.250 -1.076

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81201.81202.47982.47982.47982.4798
C21.81201.47971.08221.08222.20692.2069
C31.81201.47972.20692.20691.08221.0822
H42.47981.08222.20691.82223.09352.4999
H52.47981.08222.20691.82222.49993.0935
H62.47982.20691.08223.09352.49991.8222
H72.47982.20691.08222.49993.09351.8222

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.901 S1 C2 H4 115.611
S1 C2 H5 115.611 S1 C3 C2 65.901
S1 C3 H6 115.611 S1 C3 H7 115.611
C2 S1 C3 48.197 C2 C3 H6 118.122
C2 C3 H7 118.122 C3 C2 H4 118.122
C3 C2 H5 118.122 H4 C2 H5 114.685
H6 C3 H7 114.685
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability