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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-475.929228
Energy at 298.15K-475.933749
HF Energy-475.546388
Nuclear repulsion energy101.208695
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 MP2/6-31G*
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 3206 3023 8.17      
2 A1 1563 1474 5.30      
3 A1 1195 1127 2.41      
4 A1 1100 1037 1.06      
5 A1 681 642 20.52      
6 A2 3293 3106 0.00      
7 A2 1233 1163 0.00      
8 A2 955 900 0.00      
9 B1 3305 3117 3.61      
10 B1 1009 952 5.91      
11 B1 868 819 0.36      
12 B2 3203 3021 7.47      
13 B2 1534 1447 0.23      
14 B2 1126 1061 37.63      
15 B2 714 674 1.05      

Unscaled Zero Point Vibrational Energy (zpe) 12492.2 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 11780.1 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 MP2/6-31G*
ABC
0.73754 0.36033 0.26803

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.865
C2 0.000 0.740 -0.794
C3 0.000 -0.740 -0.794
H4 -0.915 1.250 -1.080
H5 0.915 1.250 -1.080
H6 0.915 -1.250 -1.080
H7 -0.915 -1.250 -1.080

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81651.81652.48682.48682.48682.4868
C21.81651.48031.08621.08622.20922.2092
C31.81651.48032.20922.20921.08621.0862
H42.48681.08622.20921.83073.09872.5001
H52.48681.08622.20921.83072.50013.0987
H62.48682.20921.08623.09872.50011.8307
H72.48682.20921.08622.50013.09871.8307

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.954 S1 C2 H4 115.599
S1 C2 H5 115.599 S1 C3 C2 65.954
S1 C3 H6 115.599 S1 C3 H7 115.599
C2 S1 C3 48.092 C2 C3 H6 117.996
C2 C3 H7 117.996 C3 C2 H4 117.996
C3 C2 H5 117.996 H4 C2 H5 114.850
H6 C3 H7 114.850
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability