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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2/CEP-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/CEP-31G*
 hartrees
Energy at 0K-23.579413
Energy at 298.15K-23.583880
HF Energy-23.210539
Nuclear repulsion energy37.301327
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/CEP-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 3182 3021 14.81      
2 A1 1533 1455 2.73      
3 A1 1164 1105 3.64      
4 A1 1078 1024 1.62      
5 A1 673 639 22.38      
6 A2 3286 3120 0.00      
7 A2 1202 1141 0.00      
8 A2 914 868 0.00      
9 B1 3298 3131 13.73      
10 B1 975 925 7.31      
11 B1 845 802 1.26      
12 B2 3178 3018 17.28      
13 B2 1491 1415 0.38      
14 B2 1083 1028 47.04      
15 B2 692 657 1.70      

Unscaled Zero Point Vibrational Energy (zpe) 12296.4 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 11674.2 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/CEP-31G*
ABC
0.71606 0.35134 0.26101

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.875
C2 0.000 0.753 -0.806
C3 0.000 -0.753 -0.806
H4 -0.928 1.267 -1.083
H5 0.928 1.267 -1.083
H6 0.928 -1.267 -1.083
H7 -0.928 -1.267 -1.083

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.84221.84222.51012.51012.51012.5101
C21.84221.50591.09601.09602.23962.2396
C31.84221.50592.23962.23961.09601.0960
H42.51011.09602.23961.85533.13992.5332
H52.51011.09602.23961.85532.53323.1399
H62.51012.23961.09603.13992.53321.8553
H72.51012.23961.09602.53323.13991.8553

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.876 S1 C2 H4 114.989
S1 C2 H5 114.989 S1 C3 C2 65.876
S1 C3 H6 114.989 S1 C3 H7 114.989
C2 S1 C3 48.249 C2 C3 H6 117.948
C2 C3 H7 117.948 C3 C2 H4 117.948
C3 C2 H5 117.948 H4 C2 H5 115.639
H6 C3 H7 115.639
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability