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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD/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/cc-pVDZ
 hartrees
Energy at 0K-476.019003
Energy at 298.15K-476.023466
HF Energy-475.570053
Nuclear repulsion energy100.252607
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/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 3158 3030 11.55      
2 A1 1506 1444 3.22      
3 A1 1159 1112 3.36      
4 A1 1055 1012 0.21      
5 A1 657 630 22.24      
6 A2 3242 3111 0.00      
7 A2 1197 1149 0.00      
8 A2 902 866 0.00      
9 B1 3256 3124 7.91      
10 B1 965 926 3.69      
11 B1 838 804 0.12      
12 B2 3152 3024 13.38      
13 B2 1471 1411 0.12      
14 B2 1078 1034 26.88      
15 B2 684 656 0.50      

Unscaled Zero Point Vibrational Energy (zpe) 12159.4 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 11665.8 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/cc-pVDZ
ABC
0.72453 0.35327 0.26303

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.873
C2 0.000 0.747 -0.802
C3 0.000 -0.747 -0.802
H4 -0.925 1.263 -1.086
H5 0.925 1.263 -1.086
H6 0.925 -1.263 -1.086
H7 -0.925 -1.263 -1.086

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.83431.83432.50802.50802.50802.5080
C21.83431.49391.09641.09642.23052.2305
C31.83431.49392.23052.23051.09641.0964
H42.50801.09642.23051.84953.13042.5257
H52.50801.09642.23051.84952.52573.1304
H62.50802.23051.09643.13042.52571.8495
H72.50802.23051.09642.52573.13041.8495

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.970 S1 C2 H4 115.370
S1 C2 H5 115.370 S1 C3 C2 65.970
S1 C3 H6 115.370 S1 C3 H7 115.370
C2 S1 C3 48.061 C2 C3 H6 118.067
C2 C3 H7 118.067 C3 C2 H4 118.067
C3 C2 H5 118.067 H4 C2 H5 115.007
H6 C3 H7 115.007
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability