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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: QCISD/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-476.146464
Energy at 298.15K-476.150949
HF Energy-475.604782
Nuclear repulsion energy101.415513
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/6-311+G(3df,2p)
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 3154 3008 13.77      
2 A1 1522 1451 2.86      
3 A1 1156 1103 1.69      
4 A1 1063 1014 0.50      
5 A1 656 625 24.29      
6 A2 3237 3087 0.00      
7 A2 1211 1155 0.00      
8 A2 917 875 0.00      
9 B1 3250 3100 2.78      
10 B1 979 934 2.69      
11 B1 842 803 0.47      
12 B2 3150 3004 9.72      
13 B2 1493 1424 0.54      
14 B2 1098 1047 22.14      
15 B2 701 669 0.97      

Unscaled Zero Point Vibrational Energy (zpe) 12214.1 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 11648.6 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/6-311+G(3df,2p)
ABC
0.73744 0.36264 0.26922

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.862
C2 0.000 0.742 -0.792
C3 0.000 -0.742 -0.792
H4 -0.914 1.250 -1.071
H5 0.914 1.250 -1.071
H6 0.914 -1.250 -1.071
H7 -0.914 -1.250 -1.071

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81251.81252.47592.47592.47592.4759
C21.81251.48331.08181.08182.20842.2084
C31.81251.48332.20842.20841.08181.0818
H42.47591.08182.20841.82723.09582.4991
H52.47591.08182.20841.82722.49913.0958
H62.47592.20841.08183.09582.49911.8272
H72.47592.20841.08182.49913.09581.8272

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 65.846 S1 C2 H4 115.283
S1 C2 H5 115.283 S1 C3 C2 65.846
S1 C3 H6 115.283 S1 C3 H7 115.283
C2 S1 C3 48.307 C2 C3 H6 118.004
C2 C3 H7 118.004 C3 C2 H4 118.004
C3 C2 H5 118.004 H4 C2 H5 115.243
H6 C3 H7 115.243
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability