return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: MP2=FULL/6-311G**

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=FULL/6-311G**
 hartrees
Energy at 0K-476.176965
Energy at 298.15K-476.181494
HF Energy-475.589590
Nuclear repulsion energy101.407678
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=FULL/6-311G**
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 3183 3019 11.17      
2 A1 1529 1450 4.77      
3 A1 1179 1118 3.30      
4 A1 1090 1034 0.39      
5 A1 680 645 20.06      
6 A2 3273 3105 0.00      
7 A2 1209 1147 0.00      
8 A2 953 904 0.00      
9 B1 3286 3117 5.04      
10 B1 1007 955 9.80      
11 B1 860 816 0.15      
12 B2 3180 3016 8.68      
13 B2 1499 1422 0.36      
14 B2 1126 1068 44.32      
15 B2 710 674 1.99      

Unscaled Zero Point Vibrational Energy (zpe) 12382.5 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 11746.1 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=FULL/6-311G**
ABC
0.73738 0.36264 0.26942

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.862
C2 0.000 0.742 -0.791
C3 0.000 -0.742 -0.791
H4 -0.917 1.246 -1.074
H5 0.917 1.246 -1.074
H6 0.917 -1.246 -1.074
H7 -0.917 -1.246 -1.074

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81141.81142.47812.47812.47812.4781
C21.81141.48381.08421.08422.20772.2077
C31.81141.48382.20772.20771.08421.0842
H42.47811.08422.20771.83383.09452.4927
H52.47811.08422.20771.83382.49273.0945
H62.47812.20771.08423.09452.49271.8338
H72.47812.20771.08422.49273.09451.8338

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.821 S1 C2 H4 115.402
S1 C2 H5 115.402 S1 C3 C2 65.821
S1 C3 H6 115.402 S1 C3 H7 115.402
C2 S1 C3 48.358 C2 C3 H6 117.728
C2 C3 H7 117.728 C3 C2 H4 117.728
C3 C2 H5 117.728 H4 C2 H5 115.496
H6 C3 H7 115.496
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability