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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD/daug-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/daug-cc-pVDZ
 hartrees
Energy at 0K-476.046697
Energy at 298.15K-476.051128
HF Energy-475.576989
Nuclear repulsion energy99.927943
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/daug-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 3149 3149 14.52      
2 A1 1499 1499 2.75      
3 A1 1148 1148 3.15      
4 A1 1041 1041 0.15      
5 A1 634 634 24.98      
6 A2 3235 3235 0.00      
7 A2 1194 1194 0.00      
8 A2 889 889 0.00      
9 B1 3250 3250 4.19      
10 B1 952 952 2.38      
11 B1 828 828 0.32      
12 B2 3143 3143 11.00      
13 B2 1464 1464 0.20      
14 B2 1065 1065 21.70      
15 B2 657 657 0.54      

Unscaled Zero Point Vibrational Energy (zpe) 12073.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12073.9 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/daug-cc-pVDZ
ABC
0.72542 0.34889 0.26075

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.879
C2 0.000 0.747 -0.811
C3 0.000 -0.747 -0.811
H4 -0.925 1.261 -1.082
H5 0.925 1.261 -1.082
H6 0.925 -1.261 -1.082
H7 -0.925 -1.261 -1.082

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.84681.84682.50812.50812.50812.5081
C21.84681.49301.09311.09312.22722.2272
C31.84681.49302.22722.22721.09311.0931
H42.50811.09312.22721.85093.12852.5222
H52.50811.09312.22721.85092.52223.1285
H62.50812.22721.09313.12852.52221.8509
H72.50812.22721.09312.52223.12851.8509

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.158 S1 C2 H4 114.662
S1 C2 H5 114.662 S1 C3 C2 66.158
S1 C3 H6 114.662 S1 C3 H7 114.662
C2 S1 C3 47.683 C2 C3 H6 118.083
C2 C3 H7 118.083 C3 C2 H4 118.083
C3 C2 H5 118.083 H4 C2 H5 115.697
H6 C3 H7 115.697
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability