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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD(T)/aug-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 QCISD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-476.192755
Energy at 298.15K-476.197190
HF Energy-475.611601
Nuclear repulsion energy100.749324
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-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 3136 3032        
2 A1 1499 1449        
3 A1 1135 1098        
4 A1 1043 1008        
5 A1 635 614        
6 A2 3219 3112        
7 A2 1194 1154        
8 A2 893 864        
9 B1 3233 3125        
10 B1 953 921        
11 B1 828 801        
12 B2 3132 3028        
13 B2 1472 1423        
14 B2 1066 1030        
15 B2 668 645        

Unscaled Zero Point Vibrational Energy (zpe) 12052.3 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 11652.2 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 QCISD(T)/aug-cc-pVTZ
ABC
0.73421 0.35555 0.26510

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.870
C2 0.000 0.743 -0.803
C3 0.000 -0.743 -0.803
H4 -0.917 1.252 -1.073
H5 0.917 1.252 -1.073
H6 0.917 -1.252 -1.073
H7 -0.917 -1.252 -1.073

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83061.83062.48662.48662.48662.4866
C21.83061.48631.08281.08282.21202.2120
C31.83061.48632.21202.21201.08281.0828
H42.48661.08282.21201.83433.10322.5030
H52.48661.08282.21201.83432.50303.1032
H62.48662.21201.08283.10322.50301.8343
H72.48662.21201.08282.50303.10321.8343

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.049 S1 C2 H4 114.742
S1 C2 H5 114.742 S1 C3 C2 66.049
S1 C3 H6 114.742 S1 C3 H7 114.742
C2 S1 C3 47.903 C2 C3 H6 117.998
C2 C3 H7 117.998 C3 C2 H4 117.998
C3 C2 H5 117.998 H4 C2 H5 115.773
H6 C3 H7 115.773
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability