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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD(T)/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(T)/daug-cc-pVDZ
 hartrees
Energy at 0K-476.065134
Energy at 298.15K-476.069528
HF Energy-475.576461
Nuclear repulsion energy99.559681
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)/daug-cc-pVDZ
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 3127 3127        
2 A1 1482 1482        
3 A1 1132 1132        
4 A1 1026 1026        
5 A1 619 619        
6 A2 3215 3215        
7 A2 1181 1181        
8 A2 877 877        
9 B1 3231 3231        
10 B1 937 937        
11 B1 820 820        
12 B2 3122 3122        
13 B2 1450 1450        
14 B2 1044 1044        
15 B2 635 635        

Unscaled Zero Point Vibrational Energy (zpe) 11949.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11949.6 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 QCISD(T)/daug-cc-pVDZ
ABC
0.72229 0.34553 0.25862

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.883
C2 0.000 0.748 -0.816
C3 0.000 -0.748 -0.816
H4 -0.928 1.263 -1.084
H5 0.928 1.263 -1.084
H6 0.928 -1.263 -1.084
H7 -0.928 -1.263 -1.084

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.85591.85592.51532.51532.51532.5153
C21.85591.49631.09491.09492.23152.2315
C31.85591.49632.23152.23151.09491.0949
H42.51531.09492.23151.85593.13512.5267
H52.51531.09492.23151.85592.52673.1351
H62.51532.23151.09493.13512.52671.8559
H72.51532.23151.09492.52673.13511.8559

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.226 S1 C2 H4 114.474
S1 C2 H5 114.474 S1 C3 C2 66.226
S1 C3 H6 114.474 S1 C3 H7 114.474
C2 S1 C3 47.547 C2 C3 H6 118.071
C2 C3 H7 118.071 C3 C2 H4 118.071
C3 C2 H5 118.071 H4 C2 H5 115.893
H6 C3 H7 115.893
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability