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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD(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 QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-476.182128
Energy at 298.15K-476.186576
HF Energy-475.610515
Nuclear repulsion energy100.807179
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)/cc-pVTZ
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 3142 2981        
2 A1 1503 1426        
3 A1 1140 1082        
4 A1 1049 995        
5 A1 638 606        
6 A2 3224 3059        
7 A2 1200 1138        
8 A2 905 858        
9 B1 3238 3071        
10 B1 961 912        
11 B1 834 791        
12 B2 3139 2977        
13 B2 1478 1402        
14 B2 1073 1017        
15 B2 674 640        

Unscaled Zero Point Vibrational Energy (zpe) 12098.5 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 11476.6 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)/cc-pVTZ
ABC
0.73480 0.35609 0.26538

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.870
C2 0.000 0.743 -0.801
C3 0.000 -0.743 -0.801
H4 -0.916 1.251 -1.075
H5 0.916 1.251 -1.075
H6 0.916 -1.251 -1.075
H7 -0.916 -1.251 -1.075

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.82891.82892.48722.48722.48722.4872
C21.82891.48621.08231.08232.21132.2113
C31.82891.48622.21132.21131.08231.0823
H42.48721.08232.21131.83133.10062.5020
H52.48721.08232.21131.83132.50203.1006
H62.48722.21131.08233.10062.50201.8313
H72.48722.21131.08232.50203.10061.8313

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.027 S1 C2 H4 114.947
S1 C2 H5 114.947 S1 C3 C2 66.027
S1 C3 H6 114.947 S1 C3 H7 114.947
C2 S1 C3 47.946 C2 C3 H6 117.988
C2 C3 H7 117.988 C3 C2 H4 117.988
C3 C2 H5 117.988 H4 C2 H5 115.569
H6 C3 H7 115.569
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability