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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CISD/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/cc-pVTZ
 hartrees
Energy at 0K-476.086950
Energy at 298.15K-476.091494
HF Energy-475.611144
Nuclear repulsion energy101.802418
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 CISD/cc-pVTZ
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 3238 3011 12.42      
2 A1 1562 1452 2.92      
3 A1 1190 1106 2.00      
4 A1 1096 1019 0.57      
5 A1 674 627 28.28      
6 A2 3319 3086 0.00      
7 A2 1246 1159 0.00      
8 A2 941 875 0.00      
9 B1 3333 3099 3.59      
10 B1 1004 934 2.92      
11 B1 864 803 0.35      
12 B2 3233 3006 10.91      
13 B2 1532 1424 0.57      
14 B2 1136 1056 26.13      
15 B2 729 678 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 12547.8 cm-1
Scaled (by 0.9298) Zero Point Vibrational Energy (zpe) 11667.0 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 CISD/cc-pVTZ
ABC
0.74546 0.36453 0.27095

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.860
C2 0.000 0.738 -0.791
C3 0.000 -0.738 -0.791
H4 -0.908 1.243 -1.067
H5 0.908 1.243 -1.067
H6 0.908 -1.243 -1.067
H7 -0.908 -1.243 -1.067

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.80781.80782.46552.46552.46552.4655
C21.80781.47581.07451.07452.19602.1960
C31.80781.47582.19602.19601.07451.0745
H42.46551.07452.19601.81503.07772.4855
H52.46551.07452.19601.81502.48553.0777
H62.46552.19601.07453.07772.48551.8150
H72.46552.19601.07452.48553.07771.8150

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.910 S1 C2 H4 115.225
S1 C2 H5 115.225 S1 C3 C2 65.910
S1 C3 H6 115.225 S1 C3 H7 115.225
C2 S1 C3 48.179 C2 C3 H6 118.024
C2 C3 H7 118.024 C3 C2 H4 118.024
C3 C2 H5 118.024 H4 C2 H5 115.254
H6 C3 H7 115.254
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability