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All results from a given calculation for C2H4S (Thiirane)

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-476.168532
Energy at 298.15K-476.164217
HF Energy-475.547065
Nuclear repulsion energy101.492931
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 CBS-Q
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 3312 3312 16.69      
2 A1 1641 1641 5.96      
3 A1 1235 1235 5.37      
4 A1 1146 1146 0.00      
5 A1 677 677 49.79      
6 A2 3392 3392 0.00      
7 A2 1304 1304 0.00      
8 A2 989 989 0.00      
9 B1 3407 3407 7.50      
10 B1 1057 1057 3.45      
11 B1 898 898 0.45      
12 B2 3304 3304 18.91      
13 B2 1603 1603 0.11      
14 B2 1200 1200 38.43      
15 B2 741 741 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 12952.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12952.5 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 CBS-Q
ABC
0.73217 0.35927 0.26697

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 0.000 0.863
C2 0.000 0.738 -0.795
C3 0.000 -0.738 -0.795
H4 -0.908 1.249 -1.070
H5 0.908 1.249 -1.070
H6 0.908 -1.249 -1.070
H7 -0.908 -1.249 -1.070

Atom - Atom Distances (Å)
  S1 C2 C3 H4 H5 H6 H7
S11.81471.81472.47402.47402.47402.4740
C21.81471.47531.07771.07772.20142.2014
C31.81471.47532.20142.20141.07771.0777
H42.47401.07772.20141.81613.08812.4977
H52.47401.07772.20141.81612.49773.0881
H62.47402.20141.07773.08812.49771.8161
H72.47402.20141.07772.49773.08811.8161

picture of Thiirane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 C2 C3 66.017 S1 C2 H4 115.206
S1 C2 H5 115.206 S1 C3 C2 66.017
S1 C3 H6 115.206 S1 C3 H7 115.206
C2 S1 C3 47.966 C2 C3 H6 118.316
C2 C3 H7 118.316 C3 C2 H4 118.316
C3 C2 H5 118.316 H4 C2 H5 114.826
H6 C3 H7 114.826
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability