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: MP4/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP4/aug-cc-pVDZ
 hartrees
Energy at 0K-476.062458
Energy at 298.15K-476.066853
HF Energy-475.575887
Nuclear repulsion energy99.551948
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 MP4/6-31G*
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 3160 3087        
2 A1 1545 1509        
3 A1 1173 1146        
4 A1 1083 1058        
5 A1 659 643        
6 A2 3241 3166        
7 A2 1220 1191        
8 A2 937 916        
9 B1 3254 3179        
10 B1 993 970        
11 B1 858 838        
12 B2 3157 3084        
13 B2 1517 1482        
14 B2 1108 1083        
15 B2 686 670        

Unscaled Zero Point Vibrational Energy (zpe) 12294.4 cm-1
Scaled (by 0.9769) Zero Point Vibrational Energy (zpe) 12010.4 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 MP4/aug-cc-pVDZ
ABC
0.72225 0.34547 0.25860

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.883
C2 0.000 0.748 -0.816
C3 0.000 -0.748 -0.816
H4 -0.928 1.264 -1.084
H5 0.928 1.264 -1.084
H6 0.928 -1.264 -1.084
H7 -0.928 -1.264 -1.084

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.85601.85602.51532.51532.51532.5153
C21.85601.49581.09541.09542.23202.2320
C31.85601.49582.23202.23201.09541.0954
H42.51531.09542.23201.85673.13682.5282
H52.51531.09542.23201.85672.52823.1368
H62.51532.23201.09543.13682.52821.8567
H72.51532.23201.09542.52823.13681.8567

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.237 S1 C2 H4 114.429
S1 C2 H5 114.429 S1 C3 C2 66.237
S1 C3 H6 114.429 S1 C3 H7 114.429
C2 S1 C3 47.526 C2 C3 H6 118.115
C2 C3 H7 118.115 C3 C2 H4 118.115
C3 C2 H5 118.115 H4 C2 H5 115.874
H6 C3 H7 115.874
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability