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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CISD/3-21G

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/3-21G
 hartrees
Energy at 0K-473.401057
Energy at 298.15K-473.405406
HF Energy-473.156259
Nuclear repulsion energy96.992936
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/3-21G
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 3229 3040 2.49      
2 A1 1565 1473 2.87      
3 A1 1127 1061 0.16      
4 A1 1087 1023 4.39      
5 A1 556 524 24.06      
6 A2 3312 3118 0.00      
7 A2 1260 1186 0.00      
8 A2 859 808 0.00      
9 B1 3330 3135 1.48      
10 B1 932 878 1.28      
11 B1 875 823 3.44      
12 B2 3221 3032 3.41      
13 B2 1543 1452 5.44      
14 B2 1122 1056 45.96      
15 B2 577 543 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 12297.5 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 11575.6 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/3-21G
ABC
0.73249 0.31263 0.24036

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.931
C2 0.000 0.743 -0.869
C3 0.000 -0.743 -0.869
H4 -0.918 1.256 -1.117
H5 0.918 1.256 -1.117
H6 0.918 -1.256 -1.117
H7 -0.918 -1.256 -1.117

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.94691.94692.57242.57242.57242.5724
C21.94691.48611.08111.08112.21432.2143
C31.94691.48612.21432.21431.08111.0811
H42.57241.08112.21431.83673.11252.5128
H52.57241.08112.21431.83672.51283.1125
H62.57242.21431.08113.11252.51281.8367
H72.57242.21431.08112.51283.11251.8367

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.564 S1 C2 H4 113.195
S1 C2 H5 113.195 S1 C3 C2 67.564
S1 C3 H6 113.195 S1 C3 H7 113.195
C2 S1 C3 44.873 C2 C3 H6 118.351
C2 C3 H7 118.351 C3 C2 H4 118.351
C3 C2 H5 118.351 H4 C2 H5 116.307
H6 C3 H7 116.307
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability