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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CCD/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 CCD/3-21G
 hartrees
Energy at 0K-473.424305
Energy at 298.15K-473.428626
HF Energy-473.155500
Nuclear repulsion energy96.640259
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 CCD/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 3176 3088 2.91      
2 A1 1542 1500 2.42      
3 A1 1107 1077 0.07      
4 A1 1063 1033 5.30      
5 A1 564 549 17.12      
6 A2 3259 3169 0.00      
7 A2 1238 1204 0.00      
8 A2 836 812 0.00      
9 B1 3277 3186 2.85      
10 B1 918 892 1.23      
11 B1 861 837 3.38      
12 B2 3170 3082 3.78      
13 B2 1523 1480 5.04      
14 B2 1100 1070 39.18      
15 B2 564 549 0.89      

Unscaled Zero Point Vibrational Energy (zpe) 12098.3 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 11763.2 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 CCD/3-21G
ABC
0.72556 0.31085 0.23872

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.934
C2 0.000 0.747 -0.870
C3 0.000 -0.747 -0.870
H4 -0.922 1.261 -1.125
H5 0.922 1.261 -1.125
H6 0.922 -1.261 -1.125
H7 -0.922 -1.261 -1.125

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.95231.95232.58382.58382.58382.5838
C21.95231.49441.08551.08552.22422.2242
C31.95231.49442.22422.22421.08551.0855
H42.58381.08552.22421.84343.12372.5218
H52.58381.08552.22421.84342.52183.1237
H62.58382.22421.08553.12372.52181.8434
H72.58382.22421.08552.52183.12371.8434

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 67.497 S1 C2 H4 113.445
S1 C2 H5 113.445 S1 C3 C2 67.497
S1 C3 H6 113.445 S1 C3 H7 113.445
C2 S1 C3 45.007 C2 C3 H6 118.245
C2 C3 H7 118.245 C3 C2 H4 118.245
C3 C2 H5 118.245 H4 C2 H5 116.232
H6 C3 H7 116.232
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability