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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-475.962786
Energy at 298.15K-475.967286
HF Energy-475.546108
Nuclear repulsion energy100.940059
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3174 3022 11.75      
2 A1 1554 1480 5.01      
3 A1 1182 1126 3.63      
4 A1 1091 1039 0.54      
5 A1 669 637 23.79      
6 A2 3251 3096 0.00      
7 A2 1228 1169 0.00      
8 A2 944 899 0.00      
9 B1 3264 3108 7.74      
10 B1 1002 954 5.01      
11 B1 863 822 0.34      
12 B2 3169 3018 12.64      
13 B2 1524 1451 0.17      
14 B2 1123 1069 37.19      
15 B2 701 667 0.90      

Unscaled Zero Point Vibrational Energy (zpe) 12368.7 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 11778.7 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/6-31G*
ABC
0.73352 0.35845 0.26652

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.867
C2 0.000 0.742 -0.795
C3 0.000 -0.742 -0.795
H4 -0.916 1.254 -1.084
H5 0.916 1.254 -1.084
H6 0.916 -1.254 -1.084
H7 -0.916 -1.254 -1.084

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82061.82062.49352.49352.49352.4935
C21.82061.48471.08841.08842.21532.2153
C31.82061.48472.21532.21531.08841.0884
H42.49351.08842.21531.83273.10592.5076
H52.49351.08842.21531.83272.50763.1059
H62.49352.21531.08843.10592.50761.8327
H72.49352.21531.08842.50763.10591.8327

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.936 S1 C2 H4 115.702
S1 C2 H5 115.702 S1 C3 C2 65.936
S1 C3 H6 115.702 S1 C3 H7 115.702
C2 S1 C3 48.127 C2 C3 H6 118.030
C2 C3 H7 118.030 C3 C2 H4 118.030
C3 C2 H5 118.030 H4 C2 H5 114.693
H6 C3 H7 114.693
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability