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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CCSD(T)/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 CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-476.181814
Energy at 298.15K-476.186265
HF Energy-475.610546
Nuclear repulsion energy100.842998
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 CCSD(T)/cc-pVTZ
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 3144 3065        
2 A1 1503 1466        
3 A1 1141 1112        
4 A1 1050 1023        
5 A1 640 624        
6 A2 3226 3145        
7 A2 1200 1170        
8 A2 905 883        
9 B1 3239 3158        
10 B1 962 938        
11 B1 834 813        
12 B2 3140 3061        
13 B2 1478 1441        
14 B2 1073 1046        
15 B2 676 659        

Unscaled Zero Point Vibrational Energy (zpe) 12105.6 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 11800.6 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 CCSD(T)/cc-pVTZ
ABC
0.73492 0.35648 0.26560

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.869
C2 0.000 0.743 -0.801
C3 0.000 -0.743 -0.801
H4 -0.915 1.251 -1.075
H5 0.915 1.251 -1.075
H6 0.915 -1.251 -1.075
H7 -0.915 -1.251 -1.075

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82801.82802.48652.48652.48652.4865
C21.82801.48621.08211.08212.21102.2110
C31.82801.48622.21102.21101.08211.0821
H42.48651.08212.21101.83103.10002.5015
H52.48651.08212.21101.83102.50153.1000
H62.48652.21101.08213.10002.50151.8310
H72.48652.21101.08212.50153.10001.8310

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.013 S1 C2 H4 114.976
S1 C2 H5 114.976 S1 C3 C2 66.013
S1 C3 H6 114.976 S1 C3 H7 114.976
C2 S1 C3 47.973 C2 C3 H6 117.976
C2 C3 H7 117.976 C3 C2 H4 117.976
C3 C2 H5 117.976 H4 C2 H5 115.559
H6 C3 H7 115.559
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability