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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD(T)/TZVP

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)/TZVP
 hartrees
Energy at 0K-476.073686
Energy at 298.15K-476.078141
HF Energy-475.593004
Nuclear repulsion energy100.330952
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)/TZVP
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 3153 3037        
2 A1 1522 1466        
3 A1 1149 1107        
4 A1 1081 1041        
5 A1 633 610        
6 A2 3238 3119        
7 A2 1208 1163        
8 A2 916 883        
9 B1 3252 3132        
10 B1 973 937        
11 B1 851 820        
12 B2 3150 3034        
13 B2 1494 1439        
14 B2 1110 1069        
15 B2 654 630        

Unscaled Zero Point Vibrational Energy (zpe) 12191.1 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 11742.5 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)/TZVP
ABC
0.73561 0.35025 0.26225

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.878
C2 0.000 0.743 -0.808
C3 0.000 -0.743 -0.808
H4 -0.916 1.250 -1.086
H5 0.916 1.250 -1.086
H6 0.916 -1.250 -1.086
H7 -0.916 -1.250 -1.086

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.84201.84202.50172.50172.50172.5017
C21.84201.48511.08361.08362.21082.2108
C31.84201.48512.21082.21081.08361.0836
H42.50171.08362.21081.83203.09982.5004
H52.50171.08362.21081.83202.50043.0998
H62.50172.21081.08363.09982.50041.8320
H72.50172.21081.08362.50043.09981.8320

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.227 S1 C2 H4 115.067
S1 C2 H5 115.067 S1 C3 C2 66.227
S1 C3 H6 115.067 S1 C3 H7 115.067
C2 S1 C3 47.545 C2 C3 H6 117.939
C2 C3 H7 117.939 C3 C2 H4 117.939
C3 C2 H5 117.939 H4 C2 H5 115.423
H6 C3 H7 115.423
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability