return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H4S (Thiirane)

using model chemistry: B2PLYP=FULLultrafine/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP=FULLultrafine/STO-3G
 hartrees
Energy at 0K-471.120288
Energy at 298.15K 
HF Energy-471.071373
Nuclear repulsion energy100.631538
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 B2PLYP=FULLultrafine/STO-3G
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 3397 3397 0.07      
2 A1 1665 1665 3.00      
3 A1 1259 1259 0.84      
4 A1 1148 1148 0.00      
5 A1 814 814 4.83      
6 A2 3535 3535 0.00      
7 A2 1287 1287 0.00      
8 A2 985 985 0.00      
9 B1 3541 3541 2.49      
10 B1 1063 1063 0.01      
11 B1 906 906 0.03      
12 B2 3391 3391 0.49      
13 B2 1646 1646 0.36      
14 B2 1209 1209 15.20      
15 B2 853 853 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 13348.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13348.8 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 B2PLYP=FULLultrafine/STO-3G
ABC
0.70649 0.36405 0.26589

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.861
C2 0.000 0.763 -0.779
C3 0.000 -0.763 -0.779
H4 -0.916 1.271 -1.109
H5 0.916 1.271 -1.109
H6 0.916 -1.271 -1.109
H7 -0.916 -1.271 -1.109

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.80901.80902.51732.51732.51732.5173
C21.80901.52561.09841.09842.25492.2549
C31.80901.52562.25492.25491.09841.0984
H42.51731.09842.25491.83233.13352.5420
H52.51731.09842.25491.83232.54203.1335
H62.51732.25491.09843.13352.54201.8323
H72.51732.25491.09842.54203.13351.8323

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.060 S1 C2 H4 117.871
S1 C2 H5 117.871 S1 C3 C2 65.060
S1 C3 H6 117.871 S1 C3 H7 117.871
C2 S1 C3 49.881 C2 C3 H6 117.558
C2 C3 H7 117.558 C3 C2 H4 117.558
C3 C2 H5 117.558 H4 C2 H5 113.043
H6 C3 H7 113.043
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability