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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-473.567301
Energy at 298.15K-473.571769
HF Energy-473.261896
Nuclear repulsion energy100.188172
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 MP2/3-21G*
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 3197 3042 5.62      
2 A1 1574 1497 4.56      
3 A1 1157 1100 0.20      
4 A1 1066 1014 3.65      
5 A1 610 580 20.03      
6 A2 3280 3120 0.00      
7 A2 1247 1186 0.00      
8 A2 939 893 0.00      
9 B1 3296 3136 3.22      
10 B1 1006 957 4.96      
11 B1 893 849 1.07      
12 B2 3193 3037 5.60      
13 B2 1563 1486 1.22      
14 B2 1153 1097 41.27      
15 B2 665 633 0.54      

Unscaled Zero Point Vibrational Energy (zpe) 12419.0 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 11814.2 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 MP2/3-21G*
ABC
0.72221 0.35266 0.26186

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.875
C2 0.000 0.752 -0.804
C3 0.000 -0.752 -0.804
H4 -0.916 1.257 -1.087
H5 0.916 1.257 -1.087
H6 0.916 -1.257 -1.087
H7 -0.916 -1.257 -1.087

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83921.83922.50392.50392.50392.5039
C21.83921.50481.08381.08382.22672.2267
C31.83921.50482.22672.22671.08381.0838
H42.50391.08382.22671.83233.11122.5144
H52.50391.08382.22671.83232.51443.1112
H62.50392.22671.08383.11122.51441.8323
H72.50392.22671.08382.51443.11121.8323

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.853 S1 C2 H4 115.431
S1 C2 H5 115.431 S1 C3 C2 65.853
S1 C3 H6 115.431 S1 C3 H7 115.431
C2 S1 C3 48.294 C2 C3 H6 117.761
C2 C3 H7 117.761 C3 C2 H4 117.761
C3 C2 H5 117.761 H4 C2 H5 115.405
H6 C3 H7 115.405
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability