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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD(T)/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 QCISD(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-476.062707
Energy at 298.15K-476.067101
HF Energy-475.575883
Nuclear repulsion energy99.561219
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 QCISD(T)/aug-cc-pVDZ
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 3131 3061        
2 A1 1484 1451        
3 A1 1133 1108        
4 A1 1029 1006        
5 A1 620 606        
6 A2 3218 3147        
7 A2 1183 1157        
8 A2 881 862        
9 B1 3233 3161        
10 B1 941 920        
11 B1 821 803        
12 B2 3125 3056        
13 B2 1452 1420        
14 B2 1041 1018        
15 B2 636 622        

Unscaled Zero Point Vibrational Energy (zpe) 11963.5 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 11697.9 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 QCISD(T)/aug-cc-pVDZ
ABC
0.72176 0.34574 0.25868

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.882
C2 0.000 0.748 -0.815
C3 0.000 -0.748 -0.815
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
S11.85541.85542.51542.51542.51542.5154
C21.85541.49671.09541.09542.23252.2325
C31.85541.49672.23252.23251.09541.0954
H42.51541.09542.23251.85653.13682.5284
H52.51541.09542.23251.85652.52843.1368
H62.51542.23251.09543.13682.52841.8565
H72.51542.23251.09542.52843.13681.8565

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.214 S1 C2 H4 114.483
S1 C2 H5 114.483 S1 C3 C2 66.214
S1 C3 H6 114.483 S1 C3 H7 114.483
C2 S1 C3 47.573 C2 C3 H6 118.094
C2 C3 H7 118.094 C3 C2 H4 118.094
C3 C2 H5 118.094 H4 C2 H5 115.856
H6 C3 H7 115.856
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability