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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CISD/cc-pV(T+d)Z

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/cc-pV(T+d)Z
 hartrees
Energy at 0K-476.089198
Energy at 298.15K-476.093745
HF Energy-475.613096
Nuclear repulsion energy101.978114
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 CISD/cc-pV(T+d)Z
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 3237 3237 12.86      
2 A1 1561 1561 3.04      
3 A1 1188 1188 1.71      
4 A1 1095 1095 0.63      
5 A1 675 675 27.83      
6 A2 3318 3318 0.00      
7 A2 1245 1245 0.00      
8 A2 942 942 0.00      
9 B1 3332 3332 3.76      
10 B1 1007 1007 2.97      
11 B1 864 864 0.35      
12 B2 3232 3232 11.23      
13 B2 1532 1532 0.51      
14 B2 1137 1137 26.00      
15 B2 734 734 1.02      

Unscaled Zero Point Vibrational Energy (zpe) 12548.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12548.6 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 CISD/cc-pV(T+d)Z
ABC
0.74478 0.36690 0.27215

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/cc-pV(T+d)Z

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.857
C2 0.000 0.739 -0.787
C3 0.000 -0.739 -0.787
H4 -0.907 1.243 -1.066
H5 0.907 1.243 -1.066
H6 0.907 -1.243 -1.066
H7 -0.907 -1.243 -1.066

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.80231.80232.46222.46222.46222.4622
C21.80231.47711.07461.07462.19672.1967
C31.80231.47712.19672.19671.07461.0746
H42.46221.07462.19671.81473.07722.4851
H52.46221.07462.19671.81472.48513.0772
H62.46222.19671.07463.07722.48511.8147
H72.46222.19671.07462.48513.07721.8147

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.809 S1 C2 H4 115.367
S1 C2 H5 115.367 S1 C3 C2 65.809
S1 C3 H6 115.367 S1 C3 H7 115.367
C2 S1 C3 48.383 C2 C3 H6 117.970
C2 C3 H7 117.970 C3 C2 H4 117.970
C3 C2 H5 117.970 H4 C2 H5 115.210
H6 C3 H7 115.210
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability